Your Computer Magazine (April 1984)

80a

*.<fc

Canada

Denmark

GermEny

Greece

Holland

Itfly

Spain

Singapore

Switzerland

U.S.A.

C&3.45
DKi 30.00
Dm 7.S0
Dra 210.00
DFL 7.0O
L 3S00
Pts 3O0.OC
MS 5.C0
SFr 6.10
S3.95 D72163I

o

D

D

APRIL 1984 BRITAIN'S BIGGEST-SELLING HOME COMPUTER MAGAZINE Vol. 4 No.4

Now a monkey with
a monocle can teach
you Spanish- j

how micros make learning
languages easy

Review: Aquarius II J

Vic Labyrinth
Spectrum Space Quest
and MultiProg

CBM-64 and Dragon
games tests

BBC Squares and Oric Lander

BettaZX-81 Basic

r 4

I

*

<^» d>

$&

■4W

£L

"si

HERE IS ONLY
OF THE SOFTWARE JUNGLE !

W \J Dirnbo f

<CA$u^\Any Spectrum

Challenger
DDCD

contact Laurence Holt lei ;- 061- 066-7401 Available from good software outlets

/j A -\.2M^M^ k ^

... qfgpo

LIDtB

MI Oil OHO«

Software S'wrtlist: page 57

Above Multi programming: page 103.
Eclo/v Language teaming: i:aae 80.

Cover pnotograph by Akn McFadcn.

44

EDITORIAL AND YOUR LETTERS: The first or die 'why haven't I got my QL
yet?" letfers; a Sinclair spokesman writes; neglected naciines neec. new software.

46

NEWS: Home computers to control your hone; computing undar canvas; run youi
Spectrum r>rourams on i CBM-64 or a QL; cui-thmat price cuts loom.

51

FIRST BYTES: User-defined
chaiacters; add-ons; A2tec calendar.

55

COMPUTER CLUB: Paul Bone in

Guildford.

57

SOFTWARE SHORTLIST: A dutc with Neptune's daughter, fun with Fred and the
Pharaohs; Blue Thunder — blunder through ami-chopper defences.

61

QUEST CORNKR: Hugo North is here to help you; me;t Lie Heroes of Karri; get rich
quick with the Treasures of I-Iamil: ;.!so hints on pirute hoards.

64

AQUARIUS II: How radical is Radofm's new computer? Kathleen Petl shields her eyet
aid peers coldly into the second dawn cf the age of Aquarius.

C Q CBM-64 GAMES: Ace computer "T f\

U O jockev Paul Bone looks at 54 releases. I U

DRAGON GAMES: Prul Bond
assesses Dragon piograms.

72

DESIGN YOUR OWN MICRO: prom Angola tc Cieam, the computers of youi
dreams — we preview some competition onirics.

77

GAMES WRITING PACKAGES: Simon Becsley looks; at Simons Basic; and at an
extension to Spectrum Basic; a graphics language; and two games designers.

80

EASY LANGUAGE LEARNING: Meirwm Jones, Mike McCann and the Your

Computer monkey demonstrate hew lo become polyglots.

86
94

DRAGON CONVOY: Vince Ccckett
sails through dire stiaits.

91

ORIC LANDER: Denis Salisbury
goes for a touchdown.

7X-8I LASER DUEL: A two player game for (he ZX-81 by DaWd tvet. Collect loads of
golc in your V-shapcd battle machine.

98

MAP PLOTTER: John Dawson makes land surveying sample with a plane labinu
simulation fm the BBC Micro and Oric printer.

1f| Q SPECTRUM MULTI-PROGRAMS: New you con use different utilities simul
U J taneously or show off all' youi games al my ime time with Mark Jones' routine.

In y SINCLAIR QL COMPETITION: Are you one of the lucky winner* of Sinclair's
U / 68008-based home computer with the built-in Microdrive?

In Q SNAPMAN $4: You are a hungry Utile Snopman, lost in tht food muv.i. David Rue*
U J has produced a remarkably complete version of Psc-Man for the CBM-64.

11 fi RBC SQUARES: Xot a prc;orative term, but a games program by Kevir Milet
I U which differs from other Basic games in its use of exclusdve-or printing.

10 I SPECTRUM SPACE QUEST: Mars too frippery' Venus a trifle artifical? Gel
b I jway from it all with John Charkswonh. Mind the blue budgies.

In C ZX-81 BETTA BASIC: A set of machine-code routine by J D Judge which provides
£- %J the ^X-8l with 14 new Basic r:ommaids — some fmind only on expensive micros.

133

VIC-20 LABYRINTH: A 3D marc
pme by Paul H, idler.

145

DRAGON SPRITE BASIC:

Gary Priest invokes sprites.

1 CI SPECTRUM TOOLKIT: Tltib pjo^iyui il designed to iielp ll>e ptog.au. wrilei by

providing user-friendly routier.s for actual programming.

IE C BBC GRAPHICS: Iar. Angel purs things into perspective wirh the help or" three-
hi U dimensonal co-oidinace geometry in the second part of this series.

IDA ZAGORSK: John Ransley searches

'the Russian monastery.

168

MUNSTbK MIMiK: Fred
SltotlDn in search of monsters.

171

RESPONSE FRAME:

Har nell hands nut hints.

Ti:n

In n SOFTWARE FILE: Ten pages of
/ O free software for most micros.

193

MTX COMPETITION: Winners

of the metal micro.

234

DATEBASE: Paul Bond lists
micrc events.

YOUR COV1PUTER. APRIL 1 984 3

The Further Avventurzqof-

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WHO HAP OOfAB IN 3SARCH
Of fa flf£W SfcAMMG HoT

VIRGIN GAMES

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CHECKOUT

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A9£NT 0035 ON
\ H/5 MISSION To $E£K AMP

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THIS PIACS & (MWUN& WITH

Bt&a, fixing 3v&£. 3ecr&i

To fiNV THS
WtZZARR HE'S

aoTjiaroF

HE'LL NBEP
IN THBBOOK.

SORCERY

B> Martyn Wheeler fir thr

Spectn m 4SK

VGC1016

By the author of the

much acclaimed Dr

Frankie. bi this mystery

t jJo you jra a wiurd

who can lly , and fly y o u
must, through) 15
screens, avoiding false

trails, evil cKoatinnd
str.-inre beings. You
must collect various
items and reach the
door iu Ik v mr aI ium»
before the attaching
beings drain your
power. The further you
get, tee harder it gen
and the more
compulsive Sorcery
becomes. To reach tf e
ultimate goal of your
trapped sorceror
friends you must be
fleet of finger and
brain. Excellent colour,
graphics and sound.

R.R.P

AMBUSH

By Brian Williams fo- the
Ccmmgdore 64

VGA 60C4

Quite simply Ambush is
a, 'just one more go!
type game. Get your
Hands on the control*
of your spaceship and
nobody will be ante to
pnse them off. Guide
the spdceihip through
storms of ever-
inc re tstal attacks from
strange alen forms. Hit
them with your User
and they split in two,
hit them agai n and they
drop a pro tor bomb.
Fast furious actiomthat
is both compelling and
addictive. This is a
winner.

£7.95 RAP.
Jovsticx

ATLAS

ASSIGNMENT

By Martyn Divie: tor hc
Sptrtrun 48<

VGC 1017

This is a text ad venture
with a difference - ft
incorporates three
arcade-style games,
just to keep you on
your tees. The play er, a
secret agent has to seek
and find ilolvn nuclear
plans. The fate of the
world is in your hands.
Using cunning and skal
to find the plans you
must decide whal

nhjpt-tt ynn tioH on
your journey will be of
use to you. Can you
enter the world of
eeeioruujo and survive?

£5.95 R.*.P.

I

■if

CHECKOUT

Br Mile Ccoke For tr e

B8CB

VGA 2011

A unique gafric ln.il

keeps your heart
beating fast. Charlie
the Checkout burglar

J nil** rvund thv »ture

collecting carpet titles,
a robot guard with
lasers tries to stop h en.
mil grid walking game
is a must for quick-
thinking, fast-fingered
players.

R.R.P.

BUGS

By Dennis bbotson (or the

Electron

VGA 8001

A rare arcade game for

the new Electron. This

falt-reovine arcade

gdmc haj trie p-laycrV

garden being invaded
by a whole host of
n.\stn.s, scorpions,
>pider> and bugs of all
kinds. Your job is to
shoot them down
before they get you.
four spray can is very
fast and very
manoeuvrable, but you
can Still get caught.

£7.95 R.R.P.

MAIL ORDER

All our programs are available at normal retail price includng postage and
parking, d rect from our "MY LOCAL DEALER HAS CONE OUT OF
BUSINESS BECAUSE HE NEVER STOCKED YOUR GAMES DEPT"

at S1-63 Psrtosello Road, .ondon vV11 3D0.

JUNGLE JIVE

By Dennis IbbOtSOn for the
BBC Bind Eectron
VGA 2801
By the author of
Another new release,
Bugs. Jungle Jive is fast
action shoot 'cm up
arcade game. Walk your

htailfer Lelwvcn tfitr

lines of snapping,
snarling and slithorinz
beasts. Shoot them all
but no* the baboons,
and especially the
snakes. Faster action ,is
you progress. But
beware the ricochet -
you couldshoot
yourself) Stunning use
of sound and colour.

£7.95 R.R.P.

[J

T

T

from- the producers of

tAmJVSC

mm

pS&lC$£.

iT^F

m

• JJj|

UIJ

5 •••;

csiwif ;«<

■ •■ .

""KM

PLUMB CRAZY!

Stop the tank exploding b 1
using your skill and ingenuity
beware the ghost!
Fun-action game for Commodore i

am

OMMANDO

' iadge by clearing the Galaxy of .

> Cosmic Kamikazes, Galactic
irds like Space Minefields and

Jr^ratei:
Mete^

Fantastic

hHim

Hjili

"spective
e<5f for £7.95

.•M

u

■Z&&

MB

• 1/

L^lUTjl

♦ * ♦

TERMINAL SOFTWARE

28 CHURCH LAME. PRESTWICH.

MANCHi&l'KK M!« BAJ.

Telephone: 06 1 -797 36C-5 or 06 ) -773 9313

INTERNATIONAL.

WlCOSC'nMXISSF:l,DORr.TlAl,.\LNaiULT. .
A/ISHMAKOTTEKDAM. CAKATK0BKNHAVN
iX AFRICA -SOUTH AFRICA. OZI50FT AUSTRALIA.
ALPrrC-MCW ZEALAND. KlCtoDICITALl' S.A

■■>■■?*■:■■.■

' '" Hi ■' '

Available from leading computer shops
and distributors, includitig:-

— Jtei^j

l 1 * I SUV'! % I Hi*

Centre Soft

WEST MIDLANDS.

Selected Lewis's
and G>op

Stores

SoftShop

International

PCS

elackburn,

FERRANTIANO
D*VEHPOBT LT3.

if

^

K

KRAKATQA

/ ~z^ — ™ — / — <

'f

The slory so fa'

"My whole body ached as I scramblec back into the chopper .
the subs were back! . . . The rockets were coming in over Kra<atoa
and the constant explosions had brough: the volcano to ife! . .
I could stay to defend the tanker or get the islanders off the volcano,
it wasn't going to be easy! . . . Arming the -ockets I lifted off and
headed for trouble . ."

price £5.95

One of the hits of the Microfair at the end of 1983 . . .

"An amazing piece of programming with fantastic full
screen graphics and great music! . . . The explosion from
the vofcano ofKrakatoa is both visually and aurally con-
'/incing. In short it's a g r eat program with some of the
biggest animated graphics we've ever seen A year ago
we would not nave believed it v/as possible to do this."

(Software Supermarket)

mmmms

■_■_■,

•_■_■_

■ • ■ a

-■_■_■_

_■■■■_
■ ■ ■ ■ ■ ■
■ a a a a a

riUUU

PILOT 64

^^^■•■^■■E^^^rwiwF

i a ■ a a

■ ■ • ■ -

-■_■_•

■ ■ ■ • a
a ■ • • ■

i ■ ■ a a

ana aw

V.VaVa"

i ■ a ■
■ ■ a i

— A flight simulation for the CBM 64 —

Using your merncry of the route safely negotiate the cross-winds
military air-zones and other hazards, over sixteen different types o :
analog and digital read-ou:, artficial horizon, air-speed irdica:or
compass, flaps, irstrument landing systems and stall warning, -ly
your way back to base and land.

price £7.50

And this is what a professional pilot has to say>

"PILOT 64 represents a very enjoyable and challenging
diversion and wi!l test the skill of pilots oi any standard.
It affords a close approximation of an actual instrument
approach and landing in a light aircraft . . . I unhesi-
tatingly recommend this game to anyone who has ever
wanted to be a 'Biggies'.
Yours faithfully

A.M.(ATR/QFI/MULWINST, B707, B72Q, B737,
DC8 ani THE on B737)'

AND SOON TO BE RELEASED:

KRAKATOA 64

THE ABOVE SPECTRUM CLASSIC CONVERTED TO THE 64

8

FROM ABBEX ELECTRONICS TA/iSTOCK HOUSE 34 36 BROWHAM RD, BEDFORD BEDS. MMO 2QD

TEL: 0234 2I35 ? V2'3 exl. 2

JOYSTICK INTERFACE

£12.95

i

INCREASE YOUR COMPUTER FUN
WITH A PROTEK J OYSTICK SET.

Play ngthecompucer game? Then take concrol of the sicua'.ion the Protek way.
Our unbeatabe combination of joystick and interface his beer specially designed
to give you arcade quality ccntroi on your Sirclair ZX Spectrum.
The Prceck joystick iriei late simply pljgs In it the tack of your Speccrum and is
compatible with a wide range o* so r tware including oestsellersfrom Quicksilva,
U lei mar-?, Orpan. A & F, CRL, and other leiding software publishers.

The Spectravision joystick controller has & haidy pistol grip, top and oase fire
button. anc rubber suction aipfocring frv single haid operation.
You can buy them separately or in a special presentation set which
comes complete with "Airliner", a flight simulator. And if s only £24.95.

Either way, they'll give you rraximum fjn whenever you pky the computer game.

Protek Computing Ltd, 1A Young Square,
Brucefield Industrial Park, Livingston, West Lothian. 0506 415353.

8 YOUR COMPUTER, APRIL 1 £84

CBM 64 SOFTWARE

THF H03BIT £14.9=

HJN-iHY HOR^lCF £5.9=

AZTEC "OMB ADVENTURE £7.9£

MOTOR MANIA f8.95

SIREM CTY £7.95

BAT AT'ACK £7.95

HOVVEF 3CVVER £8.00

FALCON PATROL £6.95

BTMANA £6.95

C_O.VNC iCart-iogc! £9.99

RADAR RAT RACE (Carlndgei £9.99

SEA WOLF £9.99

SiREN CITY £7.00

HJS~LER.. £5.95

MUNGHMAN £9.95

SUPER DOG FIGHT £8.95

FABULOUS WANCA £7.95

SIJPFR GRINDER £8.9E

PANIC £7.0G

SPRITEMAN £7.00

FROtiGtR £7.00

KONG £6.50

.... AND LOTS MORE . . .

Cheques/ PCs plus 50p PP to:

BYTEWELL

203, Court Road, Barry, S. Glamorgan
CF6 7EW

TEL: (0446) 742491

THE
MICRO WORKSHOP

MICRO COMPUTER
SPECIALISTS

(Spectrum Giuup Member)

Software and hardware over the counter for
Sinclair Spectrum, ZX-81, BBQ. Vic-20, CBM-64,
Memotech, Atari, etc.

* COMPUTERS * RAMPACK3

* JOYSTICKS * BOOKS

* KEYBOARDS * DISCS

* TAPES * LIGHT PENS

* COMPONENTS *

Business/Serious Programs avaikble

Located directly opposite Epsom Main Line

Station. Visit us or ring tor friendly service. See

and try before you buy.

Overseas/Export orders welcome

12 STATION APPROACH

EPSOM, SURREY,

EPSOM 21533

LANGUAGE LEARNING AIDS FOR

Already in use in numerous schools and colleges, these
programs provide an immensely oowerful ad to fo-eign
language learning. The cassettes nclude extensive vocabulary
lists arranged as a series of lessors, each covering a different
subiect. A tuiton control program enables individual lessons to
be baded and used as required.

Words, phrases e:c are presented li'st h one lan.gi.age. than
the other complete with all necessary accents and special

FRENCH, GERMAN & SPANISH

characters. Masculine, feninine and neuter words appear in
different colours to encourage gander learning. All lessons car be
run in nree different ways, i.e. learringonly, self-test or speed and
ace irary tesr

The programs are suitable for- pupils of all ages as simple cemmancs
enable new lessons in vocabu ary or grammar to be entered by the

uie . Tliese miy i lenbc edited 4b (fcCjuiitid mil Mured on Labile
for later use. Invaluable for homework znd exam revision!
Level A Cassettes: Contain the tuition control program and 16

comprehcrsive lessons fo r general vocabulary leaning.
Level E Cassettes Contain the tuition control program and 16

lossors inducing verb lists, adjectives, adverbs

ard phrases.

A/ailable from dealers, large store* or mail order

Alfo Available 'THE SPANISH TUTOR"

ilSifUSS Software

I Pilgrims Close, harlington. Dunstable, Beds. LU5 6LX Tel: D5255 3942

I Kosn os Software, I Pilgrims Close, Hartington, Dunstable. Beds LUS 6LX.

I Pteaie stpply che following programs for the compu:er
(tibUSPtCirtUV'ACOHtt tttC'HONifHices wzioae pcsisge a jpbcxico/
The F'enci Mutress Level A@ £9.95 □ The French Mistress Leva! B @ £9. J5 C
Tho Go'nun Maste Lewi A@ 49. 9S □ TheGemanMesrer LtveiB (jSi E9.95 □
!■•■'.■ SbanisK Tutof Laval A <S tO.Oi □ The SpamahTutcr LovsIB gi £9.»6 Q

INr'Hrs'Miss
Address

Post code

I inclose achucue posca) orter vilue s!

piyabl* to <osnos Software

YOUR COMPUTER, APRIL 1984 9

B*

tXffi

e cobwebs,

You know the storv, the Micro vou
thought would give endless hours of fun soon
becomes a five minute wonder. You get bored
and dump it on the shelf to gather dust.

With the introduction of Micronet
800 vou now have access to a vast mouth-
watering menu of facts, figures anc fun.

It we said it was a major breakthrough
in microcomputer technology vve wouldnL
be going over the top.

Jest recently at the Which
Computer Show we picked up
the prestigious RITA award for
Systems Innovation of the Year.
KI I A is tne 'Oscar' ol the
computer industry. Judged and
sponsored by the major forces in
relatecf institutes, associations
and publications.
Incredibly nil it costs is just a
pound a week to take up a subscription tc
the Micronet system. Plus, for most of you,
a local telephone call whenever you want
to connect up.

Then you've got 30,000 pages at your
fingertips, including Computer News Flashes,
all that "Prestel has to offer, and Micronet's
SwapSnop. Where you can buy anything from
joysticks to second-hand computers.

Interact with our daily news update.
You can even take over the world; competing
against hundreds or" other subscribers on the
system, in our 'Sramet' game.

If we haven't won you over with tnat
then try downloading our wide selection o:
free games and other tele-software.

Naturally, you can run household
accounts, manage businesses, :alk to other
subscribers nationwide using the sysuera.

The list is endless and so is the fun.

The only addition vou need to connect
with Micronet 800 is a modem unit.

V>art from that all you'll want is a pen
to fill in »hc coupon for more iritorrration.
Then we'll have you linked up in no time.

Before the clust settles,
in fac:.

Plcvr send nrc tin- mil tacsalxnu
Micronet 80C.

Makf Mmk-1 t>l Micro

■\d( TCSS

Telephone I

M1CRC )\l~'SO:i.Saiptor Court. 155 Harrugdan rto*l.Lor<lonfcClR j/iD. I
telephone Ql-ZiS ittj. /U [/• | 1/

\. »'KO\! I WO ScnpwcCwiB, 55 hvrwytHxi toad LunduJ.fcCJKiAD, fefcjftuicOl-^frl^

BC BASIC (Commodore 64) £57.50

At last the ultimate has arrived under the name of BC Basic. This
is a complete 9K Extension supplied in n Rom pack. Over £7 nsw
or modified commands wi htoul affecting the speed ar operation .
Mainareasof enhancementare: Hi-res, Spriles. Text Graphics,
UDQ. SuunJ", Matiiire Cade Aids, Structured program rung, l/U
and more.

TERMS: Plot su add Li-OOpon 1 andpac<ir>gtooiders —^ —
unflef CZO.yutaff agotreean al cash, cnenueoicrMit — •
care orders cvor £20.00 in the U.K. Taleihoned crooiicard -—•
orders accepftd on our 24 hour ansaphoneservtec.
All prices include VAT

SPECTRUM

LOGO £995

The Turtle' Graphics language

ZEN Editor/Assembler £12.50

A must for the serious progiammer
SU PERCH ESS 3.0 £8.95

The strongest Chess program yet
MAPOFU.K. £11.95

Educational U.K. Gecyraphv
HORSE RACE FORECAST £15.00
The Serious Punter'sAic
HISOFT PASCAL Compiler £25.00
Comoiling Pascal

VEGETABLE CRASH f 6 95

Exciting Arcade game in M/C

FROG SHOOTER f6,95

Fxriting Arcad? game in M /C

PINBALL WIZARD £5.95

Fast-action graphics and sound
BRIDGE PLAYER £8.95

Pit your wits against theSpectrjm
BACKGAMMON £5.95

Cz. commodore

DATABASE £24.50

360 pages at 10 lires/page

BC BASIC £57.50

Corrolete 9K Extension in ROM

pack

SIMPLE ACCOUNTS £24.50

Non-VAT account ng system

PAINTPIC £1950

Drawing/Painting using multi-
colour bitmap

HORSF RACE FORECAST £19.93
The Serious Punter's Aid

POOL PERM £17.25

Improveyour pools winning
chances

FOOTBALL FOR EC AST £1 9.95

Written by Protestor "rank Georyi,-

MZ MZ MZ
80A SOB 80K

Send for catalogue —

an outstanding selection

of programs available

7DD

• GUNMAN £6 35
r ast arcace game ir M.'C

• COSMIC SCRAMBLE £5 95
Spsce Adventure Game

• CHESSMAN £6 95
Save the chessmen from
destruction!

• BREAKTHROUGH £5.95
"as! arcace game

• SUPER SPACE INVADERS £6 95

A new version o ! the arcade c assic

• QUADRAX £5.95

Line up the counters and foil
opponents

• PINBALL KING £6 95
Colourf u I fast-action game in M/C

• PELMANISM £5.95

Game 3f nenory

t MOONLANDER 11 £5 95

Land the lunar module on the moon

• ATHLETE £5.95
Fas!, colourful rraze game

• STARTREK PLUS £6.95
The adventures of the starship

Enterprise'

• CURSED CHAMBERS £6.95
Testing acvenUre game

• SPEECH SYNTHESIS £ 14.50

Over 60 different sound building
blocks

• TYCOON £6.95

SlU'jk Market game

• XANAGRAMS £9,95
Challenging word game in M/C

• BIORHYTHMS PLUS £635
Program generates biorhythms

• DISASSEMBLER £12.50
Zen compatible

• KUMA COMPILER V2.0 £29,50
Get the bcot out of your MZ700

• HU-B ASIC £34,50
220 Commands + D.P.

• HU-CAL £34.50
Spreadsheet Calculator in M/C

• EASIDATA £19 50
Fas: information stcrace /retrieval

PACMAN/MILUPEOE £9.95

Superb sound and graphics

DESKMASTER 2 £33.93

Word Processor

DESKMASTER2/D £56.93

Word Processor for discTF-20
DESKMASTER 3 £33.93

Spreadsheet Calculator. 16K
DESKMASTER 3.5 £45.43

Spreadsheet Calculator tor
expanded HX-20

DESKMASTER 5 £45.43

The Editing le'minal

DESKMASTER 6 £22,43

Decision Maker

DESKMASTER 7 £22.43

Editor Assembler

DESKMASTER 8 £22.43

Mail _ister

DESKMASTER 9 £33.93

RAM Database

DESKMASTER 10 £22.43

Labeler

DESKMASTER 17 £56.93

Pert and Critical Path Analysis

DESKMASTER 20 £68.43

Viewdata

PASCAL Compiler £45.43

T me nh'p.r.T c.ndf.

FFOSSWRITEF £109 25

Wordprocessor

CASH EXCHANGE £22.43

USER DEFiN GRAPHICS £20.13

A usef u t asset tor :he HX-20 user

HOME BUDGET £22.43

Home Accounting System

HORSE RACE FORECAST £28 17

units i

apricot

KUMA FOR I H

Full Fg Forth

BASIC TOOLKIT

Ten major subroutines

ISLES OF ARTUAfM

Extensive adventure game

OTHELLO

Wth fine graphics

MAZE RUNNEF1

Thinking Mans' Maze Game

£207

£97.75

£22.43

£22.43

C1C.G8

phone NOW (073 57) 4335

or SEND FOR DETAILS

^

i i i i i i y

Please ^M

- | M 1

J? information required. J
"" and send coupon to:

~ Kuma Computers,
12, Horseshoe Parte, J
Horseshoe Road, M

Pangbourne, fl
~ Berks RG8 7JW M

htaMMm

D SHARP PC-5000

□ SIRIUS

□ SHARP PC 1500

□ SHARF700
, G SHARP A

NAME

Sd wan

a

□

a
n

D

rtl'flwfrr

D SHARP 3541

□ SAGE

D APRICOT

□ E»S0N HX-20

□ C=>SON QX-IO

ADDRESS .

Sel:<tnt

D
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a

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Hwtam

C NEWBRAN

™ COMMODORE 64

C ELECTRONIC MA L
U PRINTERS
SPECTRUM

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90S1 COL>t

micro

computer

I

YCUR COMPUTfcR. APRIL 1934

Free software,only £225.

If you own a BBC Micro, you can
now download, store and run programs
(transmitted free of charge via Ceefax)
with the new Teletext Adaptor, prined
£225 inc. VAT.

These programs make up the BBC
Telesoftware Service (which is intended to
become a computer software broadcasting
channel) and although primarily educat-
ional, ihey will soon develop
into general interest and
business areas.

And, as they will
change every two weeks,
yotill soon be able to build
up a vast bank of top qual-
ity software without ever
having to p ut yo ur hand in
your pocket.

But that's not all
the adaptor has to offer.
It also enables you to
gain access to the
normal teletext store
of data.This is differ- /
ent to simply having /
a teletext TV
because it means

this data can now be transferred to
memory and manipulated in any way you
wish (making graphs or bar charts for
instance).

It's yet another development in our
programme to help you fully realise your
BBC Micro's potential.

If you're a credit card holder you
can order the Teletext Adaptor by ringing
01-200 0200 at any time or
0933-79300 during office
hours.

(You can also find
out the address of your
local BBC Micro dealer by
calling the same numbers.)

Alternatively, you
can order it by sending off
the coupon below;

"technical Specifications

Access to Teletext and Telesoftware Services broadcast on
U.H.E channels E21 to E69.
Speed of max. data capture rate approx. 128k baud.
(8 lines of Teletext per frame)

Height 70mm. Width 210mm. Depth 350mm. Weight 2kg.
Colour; BBC Computer cream.
Construction: Moulded top and bottom to match BBC
computer profile. ABS injection moulded plastic-
Controls: Four tuning potentiometers on rear panel
Mains on/off switch on rear panel.
Power in 240v, 50Hz, 15 w.
Operating Temperature: 10° to 35°C.
Designed and manufactured to comply with BS415 Class 1
standard.

lb: BBC Microcomputers, c/o Vector Marketing.
Dcnington Estate, Wellingborough, Northants NN8 2RL.

Please send me BBC Teletext Adaptors at £225

each, inc. V/YI and delivery. I enclose PO/nheqtic payable to
Readers A/C, Acorn Computers Ltd, or charge my credit card.
Curd Number i

Amex'DiBctWViKiMw'KNifDn clc)

Name

Add

Aaoress.

. Postcode.

Signature

Rrpistirrcd >o. 140 3810 VAT No. 215 4(K)2iO

The BBC Microcomputer System.

Designed, produced and distributed by Acorn Computers Limited.

rUkr

WM»

5DFTU1RRE

FPiESEN rS |

-: iv.i : :>:;

The Birds and The Bess is an
origiral animated cortoon-
style game, introducing, for
the first time on screen, Boris
the Bee. Bars must collect os
much necar as oossible, whilst
avoid ng various raslies like
birds, wasps, centipedes un J
Venus fly traps Smooth, fast

machine- cede action

throughout, with sounc effects,

joystick opt on (most types)

and speech option with the

Currah Microspeech Unit.

Author: Adrian Sherwin with

graphics by Matthew Smith

(of Manic Mine' fame)

OTHER BEST SELLERS
FOR YOUR SPECTRUM

<&

\ »«.

Bug- Byte Limited

Mulberry Home,
Conning Place, Liverpool LI 8JB

Deuli-r-. ronton M'lTth-w 1* ■ •■■
on Oil 709 /O/l
fegi&lered Dealers con
dirt-c* fron C&S Distrifa I
or 01-960 2155

I r

MliUJCURNI: MCUSIE

^fiSS^Sfe

'Amazingly Past Arcade Action!

includes 'Training Mode and

■unique Customizing Feature

The fastest and most exciting

game for youraBK spectrum

we: House has the Not bestsellers
for the Spectrum, Commodore B4,

/.OJHIHlft 39 RRC Flprirnn and flrir

COMMODORE 64 HUNGRY
HORACE Just when you thought
computer games had nothing
nore to offer, here comes Horace
*or your Commodore 64. Hungry
Horsce creates havoc in the pad(
as he picks the flowers, anroys
:he guards and steals tieir
unch.

COMMODORE 64 HORACE GOES

SKIING the sequel to the very
successful Hungry Horace. Our
hero attempts vinter sports First
of all he must get totheski shop,
then lumhered <vith a paid 3f
skis, he has to dodge the traffic
one? again to react the snow.
Skiing is complete with sla om
flags, trees and moguls!

I f *«"fl _ rTI

COMMODORE 14 EXPOSED

A complete and comprehensive
guide that clearly explains every
function of your Commodore 64
froT BASIC to Machine
Language. Inc udes full details
on advanced programming,
graphics and sourd.

CJFKRDiM.VK
fHtxiitl

coamiDORiig]

: L_ aum mm*

COMMODORE 64 GAMES BOOK
Teach your Commodo'e 64 evsry
trek in the book, 30 programs
ranging from nerve-shattering

space games to real life
adventures "Fnr * nnmmnrtnre
64 games enthusiast, this is a
must."

— Perscnil Cifoputer News

PBSBTEATOR

IS

CGMIHG

MELBOURNE

CLASSIC ADVENTURE This is the
program that started it all! Now
you can discover the exatemen:
rjf Classic Adveituo on you
Commojore 64, and if you are
masterful enough you too csuld
become a Master Adverturer.

THE HOBBIT Visi: J.R.R. "olkien s

Middle Earth with The Hobbit.
Ihe nost amazing adventure yet
devised. "The Hobbit has been
transferred to run on the
Commodore 64 and wha; a
SJCcessit is. The graphical
displays are superb. Worth a
place in anyone's game
collection."

— Which Micro? £ Software Review.

A.C.D.S.+ 36 rtsw BASIC
commands for jour Commodore
84 coveringthe fielcs of cassette
npLt and o.itpit. graphics,
soiind and ttiiity commands. The
A.C.3.S.+ program also albws
"he user to add his own BASIC
commands. Includes a tree
demons:ration game.

HOUSE

Orders to:

Melbourne House Publishers
131 Trafalgar Road)
Greenwich, London SE10

Correspondence to:

Chuxfi Yard

Tring

Hertfordshire HP23 5LU

All Melbourne House cassette software is
unconditiona I lyguaranteec against
malfunction.

Trade enquiries welcome.

" Please send me your tree W page catalogue.
Pftasetemlme:

VIC 20

12 VICCosiionauts

.£5.55

COMMODORE 61
Books

[_ Conmodore t4 Uames Hook £5.95

\Z Commodore (4 fjgosed £6.95

Cassettes

C Commodore M Tte Hctbrt £14.95

C. Conmotoe £4 Hilary Horace £595

r~_ Commodore (4 Horace SoesSkiing £5.95

C AC0S+ £a95

C Classic Adveiture £6i9b

0RIC1

C Orit-l/48KTk Hobbit

BBC

C BBC The Hobbit ....

.£1495

.,£14.95

SPECTRUM

□ S(KrtrunTh£Hob3it4IK £14.95

D Per*iratDr4W £695

□ Tenor Oiktil 4D 4SK £6.95

□ Mcboume Dm 43K £&95

□ H.U.R.G.48H £14.95

□ AbersoftFortMSK £14.95

□ Claisic Adwt-ture 48K £695

A I versiensof 'The Hobbit'are identical with regard
tc the adventure program. Due to menory
limitations, 3DC cassette vers on does net include
graphics.

£ i

P ease add BOp for pos: & pack
TOTAL

I enclose my n cheque

[J money order for

Please debit my Access card No

.80

Expiry Date
Signature .

Name

Address . . .

Poslcoce

Access orders can be ^^^

telephoned through nn nur HP^i

24-hour ansafone (01)858 7397. CiJ

VC4A

%

DRAGON HUNGRY HORACE, It has
been said that Horace games ate
in a class of their own. In fact,
Horace is almost a legend. Hung y
Horace, the original Horace
adventure, s now available for
theOraion32.

COSMONAUT. Written entirely in
Machine Language, Cosmonaut is
an exciting and ch sllerging game
of arcade strategy. Works with
joystick or keyboard and features
moving elevators, storm troopers,
laser guns and : more. Afull screen
game for the inexpanded VIC 20.

THE HOBBIT. Visit J.R.R. TolkieVs
Middle Earth in the most amazing
a dvcnturc yet devised. "A ga me
by which future games will be
judged." — Rersoial Computing
Today. "Superior to any other
adventure game." — Your
Ccmpjter. The Hoobit is mw
available for the BBC, Oric,
Ccmrrodore 64 ard Spectrum.

H.U.R.6. A revolutionary piece of
software for your WKSpestrun
whict allows you to develop high
q jality Machine Language arcade
games wthabsoutefy no
programming experience. Enter
the H U.R.G. competition and win
£3000.

MELBOURNE DRAW. Now Witt

Melbourne Diaw vou can create
dazzling, intricate oobur graphics
and pictures on your Spectrum
s;reen wthoirt special
programming skills. The mos:
useful ard powerful graphics
utility program fcr th? Spectrjm.

FORTH, Abersoft Fath is an
implementation of the Forth
Language *'or your Spectrum 4£K.
Forth is closer :o Machine Code
and more than 10 times faster
than BASIC, "fhe cnly Spectrum
package which has been
endorsed by the Forth Interest
Grcup ,: — Sinclair User.

FENFTRATOR is one of the most
challenging arcade games for the
48K Spectrum. Am az. nglr - fast
arcade action includes training
mode and unique custornisirg
feature. 'PenetratorismypiA—
tie graphics are terrbly
impressive ... a most enjoyable
and addictive gime." —
ComDuterard Video Games.

COMMODORE 64 HORACE COES
SKIING is the acquDl totheverj-
successful Hurgry Horace. In this
adventure aur hero attemps
wirter sports. SJtiirg is complex
with slalom flags, trees an j
moguls so watch cut f-orace!

Orders to:

Melbourne House Publishers
131 Trafalgar Road
Greenwich, London SE10

Correspondence to:

Church Yard

Tring

Hertfordshire HP23 5LU

All Melbourne House cassette software is
unconditionally guaranteed against
malfunction.

Trade encuiries welcome.

□ Pleas* send me yoortree 52 page tatalcgue.
Please send me:

VIC 20

□ VIC CosraonaJts £5.95

□ Winrd I Prircess £5.95

COMMODORE 64
Books

□ Conmocore 64 Caiws Book . S3 95

□ Conmocore 64 Exioseti £695

Cassettes

p CommocoTeWlfrtHoDDrt £1495

□ Commocore 64 Huigry Horace £595

C Commocore 64 Horace Goes M»i £5 95

□ ACQ5 + EB9i

G Classic Adverture £695

DIAG0H32

□ Hurgry Horaoi £595

£1495

0I1C-1

□ 0ri<-l/48KTte Hoabit

BBC

□ BBCTIieHobMt £1495

SPECTRUM

n Spectrurt TheHoDtMt 4*K £1495

□ Penetrat>r48< £695

Q TentM-Diktil 4D 4fX £695

Q Mel*uiacDiin49K . £»95

□ H.UR.G.48K £1495

□ Abersoft Fortti48K £1495

□ Claisic Wverturc 48K £JJ95

Al versions of "The Hobbit ' are
identical with reearc to the adventure program. Due
to memory limitations, BBC cassette version
dees not inclJde graphics.

Please arid flflp inr post & pack
TOTAL

£
£
£

.80

1 enclose my Q cheque

3] money order for

Please deoit my Access card No . .

£

ExDiryDate

Signature

Name

Address ....

Postcode .

Access orders can be

rw - 1

telephoned through on our m

24-hour ansafone (01) 858 7397. r\ ^

%

A NEW WORLD OF ADVENTUR

SLACK CRYSTAL

BLACK CRYSTAL

A THIRD CONTINENT SERIES
ADVENTURE

The Classic, six program adventure
(jane tor Ilia 4BK SneC'um antf 1CK
2X8 1 computers No son ware conesion
is complete without il. ' Black Crystal

an "xccllcni graphics adventure and a
vvfil Ihr.i jQtif nil package " Sinclair
User. April 83 "Black Crystal ha?

impressed me by it; stiver [quantity and

fgoncraly high quality of presentation. I
uri'i iifiuJ 1 iiavj txuunie hi atdioi '

Spectrum 48K 100.
rjarts o.ilv £7,50
ZX81 16K over tOOl
seven parts only £7.:
WHY PAY MORE FOR
ADVENTUftE?

ENTURE

©iiCMia: smite

AfliL,., ;r\i :ivlr
a Am lure inihr
ifilfrtftof fancisy

.-j^^w.

THE ADVENTURES OF
ST. BERNARD

An >?xci'mg. last mcvinc machine oone
arcade game sriere you gude your
intrepid St. Bernard ihrougl" the perils o|
Dm icy «vaetal»rds ta rescue 'Vie Misnos;
from the clutches of the abominable

Available tor WK Spectrum i.b.tfs

VOLCANIC DUNGEON

RO CONTINENT SERIES
NTURE

nter the realm o( Myth and Magic in
ifecfctfistc Fantasy Adventuya 3at!te
■iin Magra ana ner tvii Alliss to rescue
k Princess Imprisoned in a
it Coffin Orep witlm the Volcanic
irr. F:mr nrri Di irnr>m <:r ' i ips
e hat you nan nlay th s addictve
ltire ever and over apain. Sirn'e
nliy cols cut li esane typing
iiiud williuliiw Tom AUvtutuiUS.
cton Manual with Map of Dungeon

i wiolegarne necltanism makes tor
a veiy Addctivc Program, arid jtiel'iat
remains a firm favourite with many
nturers "

few Comptlipg W&ikty June 1983

he 48K Spectrum orZX-81 16K
£5.00

THE CRYPT by Stephen Ronton

Prepare yourseff lor the many

challenges that snal conkoU you when

you dare to enie' the crypt, you wji

ba: ! e witn piart scorp*o:ts. Hel s|>awn.

Iraneis, Pes- - Negs ana it yoi are

Avatable for the 4SK Spoctru

STARFORCE ONE

STARFORCE ONE

Tako oh ii\- rchol guardiais of the

QChtrCl COinpitor ji superbly. Utyiocd

;nrpi> rSimens final batte game
(I OOl'o machine code arcade action)

Available tor 43K Spectrum £5.95

PeVll T{!D£S 1

THE DEVIL RIDES IN

I uttered th; last mentations
st'uck ihi'r.een, A
for a taint rustling in tie corner .
out of me SiarJuws they cafire

luiy agamst r.e but I was net

defenseess onti toe Angel ot Death.

aslrrifi a wingeid fwsfl" joined'the battle

Avoiding his bate of hell Ire, I look

oa'elul airri MyCrtanOiS were sfiro; but

iry lick |-cld .-,'..'<

(Fast moving, machine code, all
action, Arcade game)

Available tor 46K Spectrum £5.95

ibove are available through most good computer stores or direct from

CARNELL SOFTWARE LTD.,

h Weylands Ind. Est., Molesey Road, Hersham, Surrey KT12 3PL.
DEALERS: Contact us lor your learest wholesaler.

FROM CARNELL SOFTWARE

"THE WRATH OF MAGRA"
A THIRD CONTINENT
1IES ADVENTURE

The first born ias been destroyed Trie
Black Crystal of Beroh has been banished.
The alliance of Evil has been defeated by the
armies of Lord -endal So ends fte Ihird
we invite you to «/vn:e your name
in the history of the Fourh Age of the Third
Continent.

Ycu will meet friends and enemies, old and
new, in the long awaited sequel to Volcanic
Dungeon. Using high resolution graphics
and combining the best qualities of "Black
Crystal" and "Volcanic Dungeon", we will
allow you to become part of this tale of
revenge.

"The Wrath o' Magra" comae as three, 48K
programme's on cassette, boxed with in-
stn ir.lmn man jg! and book detailing the h s-
tory of the Third Continent and the many
spalls you will he i sing throughout the
game. For the 48K Spectrum @ £12.53.

NOTE: The Wrath of Magra" is a complete
adventure. Ydu need not buy "Volcanic
Dunceon" or "Black Crystal" Lu play it.

Available from Feb '84

CARNELL SOFTWARE LTD

>can

TRIBBLE TROUBLE

Sf-tClKWM

bble'farnrer on the
issipn to rounc up
stock, his
ra poor' Brian is
raprurec rribble back tc
BB CTgm |^^lPTO|nly8bi3b es are '(fairly) .

traiififHey ore c I oseitol Bna n, 'hefl

^re3j^MKOTrftfqcing ; Briqp
>radically,incicsrrucrab e, but va'ioLS
r^Dlgfi!appmrTO|[r^gqraM iMt^M^ V

^

fecto lias geflrgajgttpw*.,

A

/

/ /

/ /

5f

X

P&v i"

iOPTUIfiRf

ompiex J
plton, Live?

V

1 cWi.M!!',

■ i » fcK BEV

» -J*

ALSO AVAILABLE

DflNKY DOO

*^

CDCRE f>4

^lj oflj ^SlHSkeios if in a "dream,

; *vjict g'drean, a nigh't'-na'e. Ever
te'oc

gainst ycu. Skulls, nomBle
fifed walls.'ahel-snakes. ffiB

L«E|lsiEj

Ie-sWssrm

OUST

hd rhe*maze]^nscarhedl]ridjij tihfl^^^fc

o- .mile iriavBe they will all

or can-.i
Life is ha
little Din

MANIC MINER 48 K SFEGT.RLJM

JET.SET V/ILLY /8K SFECTRUjM

DM'ETRCN

' Orion'"'
•febsy-OFF

/THRUSTA

48 K SfECTRUk

:raz y BWKsps

All

CRAZ V

.MAN'IG M1lNER\
LEGION ADVENTJRE 1 '

only£

16A8 K^SrTCTRUM
z8K v SFiE.aRUM N
5 VIC 20

P. VIC 20 :

COMMODORE 64

COMMODORE '64
BBC B

>».;

^H—

i

JH fSTDC l®W.AT YOU R L OCA bfcQM PUTE R STO^E

^ MMi/im^f ^ h^i ^wa i^ mfs; or boots\and john menzies

1 a4^AL!ES ; ErlS]RE5fe COLIN StIJSS&N 051-428 7990

Maximising

The British computer industry is small vhen
judgsd by ir.lerncitional standards Two largo
American companies control 90^ o! world
markets. They can co this because the r
product* represent the standard bv which
others are Judged. When these standards are
accepted by the marketplace hey ha/e the
edled oi stafcllbhg Cm technology. Thu CP/Mis
accepted as the industry standard opcraling
system for 8 bit processors, and subsequent

cumpului liuvulDpi.iLMil hLb umploytiU l:;i-

standard, with Ihe dualeilect al making b?th
man and mach:ne portable. Operators ccn
use auierent computers, wl n Cf9M anrJ
soirware can be switched Bom machine to
rnac.iine. Fcr the er.d user the emergence of

technology

Ihese standards is cr.licat because they allow
htm to experiment with ihe technology without
risk o: entering blind alleys where systems and
p-oducts disappear. In order to avoid tms
situation Vlemotech has employed these
standard; within the MTX Series.

In lie IK there hat besn such rapid
dove.opmenl in microsystems that tn many
cases users have been seduced by Ihe
technology rather than the standards they
should be foilowng fn educational and
b'isiness applications Ih* neflri : nrcnniinn*y i<;
obvicus. This is accentuated by (he
deve.opmenl o! database technology, where
v*ry 'rrrrja inlormation ties are accumulated.
the primary expense being the input ol da. a.

Companies and schools will nol relish the idsa
of Irving tc res;uedata wirier thestaidard .'?.
bit machines appear in tv/o years time. .

Ihere has been a tendency for
mcnutaclurerc to .aunch machines vhich a*e
still on the drawlns board, and tor which no
sottware stancarcs exist, cp/m BC. the industry
standard micro operating system, supports tens
O! thOiisnntisrrfrrnmnPirrirttly avttiobl©
soltwa.-e packages. ILM take the view thai
things should be cone properly and then
released to the usor.Tnis is a w»)] tried and
clearlv well tester, premise which Memotoc.n
hai Implemented tn the MTX series.

Tho MTX Soiios nognns with the MTX50D.
which cosfe C .2?S.C0 including VAT. Tie

MTX512. illustratecl below, costs £315.00
ncludir.g VAT. has 64K ol User RAM p.us 1 6K o(
dprlirrrlF>rl Video RAM and comes wiih
extended BASIC, a powerful
assembler/disassembler, Fron: Panel machine
rvfI nrHtor'mcnitcc 4 and Koddy, a n«w text
and grcphtcs processing language.

Also included in he series, ond available
.-iov.. are Ihe D 11X80 piir.tor al£2C6,00
arid Ihe C MX and MMX monitors.

MEMDTECH

For lurtrer inlotmarica full technical
speallcatton and prices write .0:

Memut vUi Limited

FREEPOST Witney, Oxon. 0X0 6 BR.

f

in

II

• s

■S a
2 3

£*

u s

\

IHHH

STOP PRESS: NEW SPECTRUM DOMINOES 16K748K £4.98

ZUCKMAN

2X81 (16K)

'ALL MACHINE CODE

noKj

*FOUR INDEPENDENT

GHOSTS
*HICH-SCOnC 'MA.L

OF FAME'
"AUTHENTIC ARCADE

ACTION
*TITLE/DI3PLAY

MODC

ONLY £4.95 INC. P&P

* ZX Spectrum^

\\&** FROGGY 16K or 48K

SPECTRUM VERSION OF ARCADE GAME
WrTH FULL ARCADE FEATURES -

'1«f. n .*. 11 1«-l COO 1! . . ,*i , l- .

'^.iHtp'j*: bond tfw.i - a Tui*«*

*1 LlfMI *l MA' »:-.-*»i*^>-'0.i

"lip*j M^^ tic*'* «rjl»ljpM»-
■U^TDiWlfl:^ Ci9 T if ro.iVt*

^P1 BP?TTT^« ■ J ' : i

ii i( . i jit- Aimn[t» i*V', / lltu -ye*

this fcw.Hif.nxy saw mh»" fit

ONLY £$.<5 INS. P&P

t.« ~ «-

FROGGY

ZX81 (16K)

* MOVING CARS,
LOGS, TURTLES

'ALLIGATORS,
DIVING TURTLES

* TOUR 'SCFCOMG OF
ACTION

f ALL ARCADE
FEATURES

* ENTIRELY MACHINE
CODE

ONLY £4.95 INC. P&P

ORDER FORM

■»»***« ♦*+ jm ■**■#* -.... +;•*... ......... • ■» • » »«i ...... .«■»<- .*.*...

;; ::: ;;;;;; *:!*« IB ;;: ;;;.,,. j;: Hi ii Ul HI ;:: ;«*ir ;;

>«' ••■ ■■■■ — - »«**& ..• ... •• •!* IMIttlt ■*• «*i III

;?!^.;;".... *■* ai *♦*-»* ... >n .»■ .,*,--. ... ... ■». ... »». ■

...... ..■.-, -.,.>• ...... ,;., .., ... . . ... m ... ... hmmi

Vame...
Add iqss

DEPTYC4, 9 TWEED CLOSE, SWINDON,

WILTS SN2 3PU Tel: (0793) 724317

T-ade enquiries welcome Export Orders; Please add £1.00 pe- tape airmail I
Dealer enquirits: Tiger Distribution, Micro Dealer UK, Si. Albans 34351,

I

3 lease send me ll~e falawhg

■ enclose choauo'P.O. Vo fort

SEND TO: DJL Strilitaro. Dept 'C4. 9 Twod Class.
Swlnlon. Wilts SN2 5PU.

NEW! NEW! NEW!

SPECTRUM SOFTWARE
by COMPOSOUND

BLOCKBUSTER..

BLOCK BUSIER will test tour knowltdce to the brink. The game slartsolf tdsv, hut

as tob pass the 'commercial breaks. BUCK BUSTER gets harder and harder.

48k SPECTRUM. ONLY (5.95 4 50p post & parting.

CQWtPOSQOND

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Om.'M.r: and Trade ~iui.:ir: •■.
Wolcono

DtPT: YC3, 32-33 LAHGLEY CLOSE. REDDITCH, WOFCS 398 OET
TELEPHONE: {0527; 2H29 i2143S Ansvrcrphonj)

TT-S :SPECTRUM TOOLKIT

5 orog rammers' progtams for the 16K or ^8K Spsctrurr:

4R6MMA : A cnmpact liK) ».-<^oi nvo oymfutiWc BASIC Q<1cn;ion which Olda

progiamminj Bnd dBbjgging by aedhg 10 newkeywordi, with syrrax

chocking;

R£NUM8ER Aii.,-f o.itorhepiog'cm. irrolllgcntly, ineka.nfloJI GDTO s.

G0SU6'3RESTORE'»etc.

DELETE An/ Week 0! ines.

MOVE Atlccknf lines, wlhro tumburirg of GOTO'a BE.

FIND An/ string, variabto, koyboad etc.. slBrtingfrotriany Ine.

THA3E CN Display* line and statement numiers and tne cimerit valu* of any
variable or e>preHlcn isthaorooramisexBcuttd. Variable spued
execution or angla-siap.

TRA5ECFF Turns of TRACE tuncl on

VARABLES Displays an Ottered, lis of al vBtiabiesused.tvilhlher current values.

FREE
AUTO
HELP

Shows amount of free nermry, \atuet of kjy system vari£bles,and

displays UDGs.

Gl*os ujtormtlc ana numbering wnen entering programs, trom any
line number and with any step si:e.

Provides inlcrmalon oi new KeyAords.

GAMMA .11.10 protects ogains- accdenlal ovtr-wi ng d exiattng urogram lines er
NF V.', and gives a ffeghing line cursor v/iicn s eatih/ vi : . nln in tistjngs It can be
loaded inio an-/ area of FAM on a 16 or t8K nacftno

* SCFEEN : A high-r esolitior drawing prooiam with trooe- 'fill' and text print -aa:*1ies.

Cm Immisix with a jovsttct vie <empstor or Snclat inlEifaws.

*UDG . Ayu.v.ii(ol»io vJitgiiaeatngufcrotUnsagiapriiCSChainnlisir..

* TAPE : Htads and dsplays tr>* corterm of tape fie he«tws.

ARAM : A Fan Jr.ilv,yiiipiuliur biva "e"i uiy l-:il |i iMJum

£7. £5 ire. carriage Access/Visa accepted

TIMEDATALtd.Dept A

leHemmellB, Lalndon, Basildon. EssexSSl56ED Tel: (0268) 418121

NEW

FORThECBV164

(Incentive)

THE SPLAT
CHALLENGE

NEW
FORTHECBM64

THE SPLAT CHALLENGE FOR THE COMMODORE 54

£6.50

fir^NT^vJK INCENTIVE SOFTWARE, 54 LONDON ST
V-^_^_^->' READING RG14SQ (0734)591378

^CENTmT

1

A NEW EXPERIENCE IN GETTING RICH! I

48K SPECTRUM £6 60

HttCEKtNlT} NCWTWE SOFTWARE LTD, 54 London Streei.
n.-Ov^/-' fading RG1 4SQ Tel: Reaaingf0?34l 691678

VOUK CUM-'LI I bK, AHRIL - 984 27

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"ATTENTION EAHWUNOS. . .

Beamus

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CHUCKIE
EGG

CYLON
ATTACK

JUNGLE
FEVER _

PHARAOHS
TOMB

BBC

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SPECTRUM

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Available from W.H. Smiths, ©
John Menzies and all leading
computer stores.

V

jtf Software/^

Unit 8. Canaiside Industrial Estate,
Woodbine Street East, Rochdale, Lanes.
OL15 5LB. Tel: 0706 341111

30 YOUR COMHUIfcR. APRIL 1984

SOFTWARE FOR THE

\ fu ly comprehensive chess paekoje. Ten
leveli of play, tram notice to championship
standard. Pilch your wits tgcinst -he
computer with this fail, versatile machne
(ode program

TO A DO

"he cbjed ot the game is tonovijateeaef of
Ave toads otross a road ond two riven
without being rundown or thuvmiiri (IuikJs
can't swim).

—ALICE IN—
WONDERLAND

A lu ly irteraclive machine code cd.em jre
:;am« set in Wonderloid v ou play the pari
of Alee, jndexplcre the fascinating world of
Wonderlcnd, ful o : excitement ond
suspense Delve deep into ttnne I, caves ond
well: in search of hidden treasure.

KILOPEDE-

f limhato muihrcoim and the dastonc :ig
segmented Kliopede to gain bonus pjinls -
ovoic ktler crabs, tleai, ipiden end
jellyfish which chase you across nultble
level; of incieoshg difficulty.

— SUPER

MINEFIELD

"he ebject of ihc game is to jel duui me suV
of the minefield to the other wlhout beng
blown up. You on\( get one life so be card u!
- nci all the nines arevisifcle. The oily very
you can tell how mony rninet arenearby isby
looking a' the mine detector in the top right
hand conee ol the screen

tun ct high speed cround the mate colled ng
treasure ond fruit worh bonus points - but
don't gel eocght by ihc B lotto catc-i 1
Tactical dodging musl te employed t: avoid
fern. If you're- caught or step or a skull end

uusjbuncj ) u > luse unit of vour three lives.

KNUCKLES

Move Knuckles cound his maze, usinc a
joystick kick Rob ond Wage Squares.
The ohjp-rl is -n line up trw Mngir fynnn*.
using the lire key, and 53 advance to tie next

level goring a level bonus.

Please send for our free

colour catalogue of Business,
Education and Carries Software.

11 lustration: Nick Mynheer.

Cor.tinental Software Limited.
Uni: 23, Station Lane,
Witiey. Ox on

Homegrown Soft

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CentreSoft only seil the best! Whilst we're searching the World for
excitement— we dun'l forget our own back-garden. Shown below is a
colourful crop of British Software. Home Grown for Great Br tish Fun!

You can buy with total confidence f-om any of the CentreSoft
retailers below, because we guarantee replacement— free of charge—
on any -aulty media.

If you haven't bo jght your own Home Computer System yet,
all of the retailers shown carry a big choice of
Hardware. Why not call in,foraquote,
and a 'hands on' test run?

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SNOOKER

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T °THER ESCUE

Com 64

Where to f tod your CeirtreSof t stockist!

G A M ES WORKSHOP LTD.

9TThTMoor; sheTira:

(0742)7SC114.

41^ Broad Walk, Brpadrmrsh
Centre, Nottingham.
(Of.02) 58*744.

W Marsden Way,

AJndile Centres-Manchester.

(DM) 832 5865.

Utiit37. WestCou
Birmhghim Shopping Centrje.
Birmnghim. (021 1 631 4804

1 U 4_

Modata Computers Ltd

30 St Jjhns Road, "bnbridge Wells,

Kent. (0892)41555.

The Advanced

Technology Centre

207 Elthani High Street, Btham,

London . (31)859 7696.

ENGLAND
AVOM

uc, En in*,

5925855.

Radford HI-FI Ltd.

52 Slojcester Road, Bristol,
(IDT?) «ft?47

EASTAN CL I A

Brainwave

24 Crown Street. Ipswi:h. Suffolk,

(047 3) J0965,

Brainwave

51-Head Street, Colcheiter, Essex.
(0473) 50965.

GREATER LONDON -
Godfreys Computer Centre
28-32 East W al <- Basildon. Essex.

(02S8)-2fl2i4^. _L___

Alpha Scan Ltd.

Chaster Hobse, W ndsar hnd.

BeaconsfMd, Bucki. (0494)671259.

3D Computers — j

30 Station Ru.iv, Brliiiuu,
Surrey SMI j&BS. (01);6*2 2534.
i D Computes

11A Ginntr&bury Avjor,

London W5 4BH. (31

Trionic

4445tation Road. Hafrow.

(01)8610036.

Vision Store

3 Eden-Walk, Kin gston

Thimes.'SLrrev (01) 54*8974.

Lion House (Software) Ltd.

Lloi House. 227 Tottenham Court

^oidT-Loncon vvi. (Olf bi/ iffUr—

Galaxy Video

60 High Street, Maidstone, Kert.

(0622) 67926 5, j

3 D C o m [ >i 1 1 c ■ s

Unit 1, Heachfield.Stacsy Bushes,

Milton <eyiWMK126Hf?

(0908)317821 — —1

3D Com p .iters

If, c .rani*>y P.iiad. Newbjry,

Berks PGI^PB. (0635) 30C47
jd Computers
Greystonc VVbrks. The Green
Crcxley Grden. Ricktricnswom,
JdfiitiJifliDii3A^0923).77-925( I.

Adams World of Software

190c Station Road Ed^ware,
Middlesex.! 01-952 0451-

NORTHjEASTERN

Pnotosave

1S Ch=ap<ide. Bradford DOI 4]A
(0274)308598.
Bass I Bligh
4 Lower bhggate. Leeds.
^£632)45^5^

M

Computer Plus

2 Church Laie, Banbury, Oxon,
(0295) 55B90.

Calisto Com putors

119John BrighcSireet, Birmingham,

(021)6326458.

C T Electronics

The Computer 5how

Unit i.5 Handyside Arcade,
Percy Street, Newcastle-tpor

-Tyne. (0632) 6162^0;

York Computer Centre

7 5tonega:e Arcace, Yji k.
jflj M 641862
Small Fry + Hobb)
51-S3 K irk^atc Wakefield WF1 IHX
(0924)360551,
jiist Micro

l\ CarvprSrrept. Sheffield.
(0742)752732.
Corn-Tec h
6 =ast jne,"oa*nsley, (0226| 46972.
The Soft Centre

8 Queensipte. Waterdale Centre,
Gfoncntet-p02) 20038:
The Compusho a
1C Newgate Cenre, Newcaste-
Uaon-T yre. (0632) 618671

NORTHWESTERN

The Atari Center
Hom=>Fntf»nainniiK Ltd
13 Mi I erAra.de, 3 resron,LaVcs.
(0772) 562707.

1 The Sp*. Derby. (0332) 360456.

Gordon Harwood

£9-7! Hi'h Street, Alfreton,

Derbyshire. |0773) 832078.

Mays Hi-Fi

17 Churchgatc, Leicester.

0532 ?»1 7-

M ovi es Computer Centre

I Chjrch Street, Melton, Mowbriy,

Lcic«itci;(0<64)611£9.

Vista Vide*

EO Friar Lane. Nottirgham
NG1 6DQ. (0601) 418400.
Foxs Computer Centre
38-40 Upper ParliamentStreet.
Nottingham (0602) 41092<i.
Carvellj
-h7BankStreet, r\ugby€V21 2QE.
078B) 65275
Greens'

13 Ma rket W ay. Coventry,
West Midlands. (0203) 26342
Arnolds (Corby)
j5 Corporation Street. Corby,
Northants. (05366) 3645.

T 1 1 c G j'ii ekueper
£rard Pa-e, 224 High Street,
Erdington, Birmingham.
021)36416103.
The Playpen

i MarketjStreec, Hay-on-Wye,
-Hereford. (0497)820129.
Vision on Video
I55a Hig(i Sreet. Erdington.
Birmingham. (021L3i3_93fll

Home Computers

234 Church Street, iJljckpool.
(0253) 22340.
Cleartone Hi-Fi
156-158 f3aek^ur-r-R©5d^-B©konT
Lanes. (0204) J1423.|
Chester Software Centre
49-51 Book Street. Cr ester
-(0244)310315".

Silica Shop Ltd

'Mi he news, Hanerley Road

Sid.W,KertDA144DX.

(01«0111iror (01) 309111*

Ace Software

94 Wes.ern Road, Southall,

Ml<jtJx_LlB25DZ^aiE

Rams Computer Centre

117Queensway, Bletehkiy. Eucks.

(0908) £47744.

Gatwtck Computer Services

62 The Bouevard, Crkvley,

W. Sussex. (0293) 24240.

Landau Electronics

(Sutton) L^d.

215 High Street. Suttin, Surrey.

(0164) 35494

Vision Store

Microsptrt

15 Mo^rfield, Liverpool.

4031)2161628.

Camera f Computer Centre
113 Mill Street, Mtdclesflekt,
Cheshire.j06:5) 27468.

Gemini Electronics

SCJNpwrnn 'ir'^ot. Piccadilly,

SOUTHERN

Computer; tore Ltd.
?-11 ^iOi|> ioiid I- III. Bournemouth
BH26HE. (0202)296963
Gamer

14 Gloucester Road, Brighton.
0273) 698424.
Canterbury Software
9The Friar*, Can:erburyCT12AS,
0227) S3S 31. I

tffiaent Chips

40TreMirketPlsce. Chippenham,
Wiltshire. (0149)654321.
-G^BMttroland

M,incfester. (061) 236 3083.
Channel 8 Software .

S'tFishsrgate. Preston. 0772)53057

Wildings Computer Centre \>/ jnd \" e ; t er. fjM 66085
1 1l Br dge Street, Warrington
liesr«re.f>9I5)-38290;

7 Queenj Parade, Loidoi Read,
Waceriooville, Portsmouth,
(0701-1) 5 9911.

V Bed'oit) Pace, Southa-npron,
(])703) 38399.

-MierocHpi

4i If St Georges Street,

hidings Computer Centre
| MesnesStreet, Wigan.
HI) 44382.

96-?8 Nort-end, C-qydon,

SurreyCROIUD.(01
Compucasolve

jlcro Workshop

i Mostcn Line.Moston.
Manchester. (C61) 205 4974
Computer Link
21 St. Werburgh Stree - ., Cheicer.
(0244)316516.

MIDLANDS

631-7539.

8 St Marks r ill.Surbiton, Surrey

(01)3905135.

3D Computers

230folv/ortH Rise South, Tolworth,

Surbitoi,Surre/KT59NB.

(01 } 337 431 71

Video City!

45-!*7 Fshe-5 Green Road,

Ste>ena?,e. Herts. (C438) S38CKI

Datastore

Victoria Road;Hairshairr, _ So5Si

(0328) 846777.

The Atari Center

Home En^ertiinment Ltd.
2^-"ft3-Bjoad-Street7

SCOTLAND
The Silicon Centre

6-7 Antigua Street, Edinburgh,

(031)557 4546.

ttvTrTgstih Computer Centre,
17 The Mill, Craigihill Shopping
Centre, Uvinjstort. (0506) 36^78.

WALES I

Hi-Fi Western Ltd.

48 Cambrjan ^oad, Newport,
Gwenr_(Q633) 62790-

Brminghjm. (021) 643 9100.

Clywd Personal Computers

Unit "9, Daniel Owen Precinct,
Mold.(03S2) 56842.

GP video — l .

St Georges Crescsnc, Wrex|htm.

(0978; 26*451

<iHANNEL tSLAt#DS-
Audio + Computer Centre

" 3 et«r Sc-oet, St -ielier; jcrtcvi

Centr

K ALERS! -Hi BiriB-iiuLiutiori how [o b*<o(rK! J 'jfflrcSoft a.TCkM^ Wntu to

CentreSoft Ltd., CentreSoft House, Unii 24. Tipton Tradirg Estate
SlocroficJcJ^XoadyTip^vWest Midlands DY49AH TB.-r^B1=Hef59t

5

New-SindairQL

There's no comparison chart, b

The Sinclair QL is a new computer.

Not just a new Sinclair computer,
3uta totall/ new sort of computer -
10th Ing like it exists anywhere.

It's not just a ait better than this,
or a bit cheaper than that - its a
computer thats very hard to compare

with anything. Just check the features
below - and if you don't agree, take
up the challenge at the end cf the
advertisement

If you do agree, there's only
one cou rse of action you can take , . .
get yourself a SI ndairQL at the
earliest possibe moment

The Sinclair QL has
128K RAM. Big deal?

Several micros offer 1 28K RAM, or
more, as standard.The 'What Micro?'
table for December 1983 lists over
50 of them - but 40 of the 50 micros
listed cost over £2 500!

The Sinclair QL offers ycu 128K
RAM for under £400, and an option
to expand to 640K. Thai's a lot of
bytes to the pound!

The Sinclair QL has
a 32-bit processor.
Who else?

Under £2,700. nobody. Even the new
generation of business computers,
such as the IBM PC, are oily now
beginn ng to u;e 16- bit processors.

At prices like this the Motorola
68000 family -widely regarded as
the rnosl. p:>werfu microprocessors
available -will remair a luxury.

Yet with the Sincair QL,the
32-bit Motorola 68008 is available
for less than £400

You can also be sure that theQL
will not become outdated. 32-bit
architecture is future-proof.

32-bit processor architecture, 128K
RAM, anri Q DOScnmhine to give
the QLtihe performance of a mint-
computer for the price of a micro.

Exclusive: new QDOS
operating system

No competition! QDOS sets a nsw
standard in operating systems for the
68000 family of processors, and may
wdl bcLun ic the ii idusLiy standard.

GDOS is a single-user, multi-
tasking, tine-sliced system using
Sinclair's new SuperBASlC as a
com mane larguage.

One sf its mr>st ^ignifkrnt
features is its very powerful multi-
tasking capability- the ability to rur
severa programs indviduallvard
simultaneously. It car also display the
results simultaneously in different
po - lions of the screen. These are
features n^t normally availaole on
computers costing less than £7,000.

Eleven input/output ports

QL ROM Cartridge sol

2 x Joystick ports 2 x 35-23 2-C

_JL

O

©iQlfplQKDldQliPlQlQF

GB|Cs-i0©l^i©| (gl©i0|^

<E3J®^©©I©!®|Q)|®|C
CZD0l®l0!0lCJ '

dC"

(jD (s> '--.

1 — Expansion slo'

New professional
keyboard

The QL keyboard is designed fa fast
input of data and programs.

ltisafullsizcQWERT\
keyboard, with 65 keys, includirga
space oar; left-and right-nand shift
keys; five function keys; end fou'
separate cursor-cont'oi keys- key
action is positive and precise

A membrane beneath :he
keyboard protects the machine from
dust (;.nd cofteel), and for users a+io
find an angled ke/bcard mere
comfortable, the computer can be
raised slightly at tie back by small
detachable feet — *^^«

.'•.•--.'•

@ Sindaii Ol OnOS. OlUi and ZX Mictodf ire
ae tiide ntarle of ?indair Research Ltd.

£399

I

ecause there's no comparison!

Advanced new friendly
language - Sinclair
SuperBASIC

The new Sinclair SuperBASIC
comb nesthe familiarity of BAS C with
a number of major developments
wfiididlluw the QL^i fullpuwei to be
exDloited.

Unlike conventional BASIC, its
procedure facility allows code to be
written in clearly-defined blocks; ex-
tendability allows new procedures to
be added which will wo'k ir exactly
the same way as the command pro-
cedures built into the ROM; ana its
constant execution speed means that
SuperBASIC does net get slower as
prjgrarnsgel larger.

2x„ocala'eanetwor<
TV (UHF) Monitor

"UUUUUUUUUU

lijuduij

WBM

qiqicz:

)]@©CZJ

:jl

Microdrve extension sot — '

Two 100K microdrives
built in

The Microdrives for :he 5indairQL
are Identical In princ pie to the
popular and DrovenZX Microdrives,
but gue increased capacity [at least
1C0K bytes each} and a faster data-
transfer rate. Typcal access speed is
3.5 seconds, ^nd loading i<; at in to
15 K bytes pe' second, Tne Sine air QL
has two built-in Microdrives. If
required, a further six unite can be

connected.

Four blank cartridges are
suppl ed with the mach ne.

_J3*-

® Quil , Easel, Archive and Abacus
are trace marks of ^sion Ltd.

Included - superb professional software

The suite of foir programs is written by Psion specially for the QL and
incorporates many major developments All programs use full colour, and
data is toansportabe from one to another. (For example, figures can be
transferred from spreadsheet to graphics for an instanl visual presentation.)

Word-processing

^^

^^^

■■*■£

I* *• »mi>l Xl'lf «1|
Mr] . ■ n i> . |

Business graphics

■ ir" a :.:t ' i M>J '

Certain to set a new standard of
excellence, QL Quill uses the power of
the QL to show on the screen exactly
what you key in and to print out
exactly what you see on th? sceen.

A beginner can be using QL
Quill fur wuid-^iu<.::bbiiigwithiri
minutes.

QLQu II brings you all the
facilities of a very advanced word-
processing package

Spreadsheet

QL Easel isa high-'esolution colour
orogram so easy to us? you probably
won't referto the manual It handles
anything from lines, shaded curves c
listogramsto overlapping orstackec
oars or pie charts. QL :asel does not
Gt|iiircryuii tufun idtyuur diipldy
oefore entering data; it handles design
ind scaling automatically or under
your control. Text can be added and
altered as simply as data.

Database management

QL Abacus makes simultaneous
calculations and "what if model-
conr.rudior easier than the/ve ever
beer. Samp e appli:ations are
provded, including budget-planning
and cash-tlow analysis. QL Abacus
allows you to refer to rows columns
and cells by nanes. not just letters
and numbers.Func.ion keys c&n be
assigned to change a variable and
carry out a comolete "what if
calculation with a single key-stroke.

QL Archive is a vey powerful filing
system wh ch sets newstandards using
a language even simpler than DA5IC
It combines ease of use fcr simple
applications - sucn as card indices -
with huge oov/er as a multi-file cata
processor.

An easy-to-use labelling facility
means that you don't have to ask for
your file by its full name - a few letters
are enough.

New -the Sinclair QLUB

The CLUB is the QL Users Bureau.
Membership is ooen to all QL owners.
For an annua subscription of £35,
QLUB members receive one free
update to each of the four programs
supplied with the QL ard six
bi-monthly newsletters. Sinclair lias
also made exclusive arrangements
for QLUB members to obtan soft-
ware assistance on QL Quill, Abacis,
Archive o^ Easel by writing to Psion.

The Sinclair QL challenge

If vou're seriously considering any
other computer, oost the coupon tor a
blowoy-blow comparison. v/VteTI take
a pub'/sfredornoariion chart for the
machine you re considering (not one
we've created ourselves; and give you
the Sinclair CL figures, detail by detail.

Take action today!

To order by mail

- complete the coupon anc send
it to the FREEPOST address below.
For credit card holders it rmy be
possible to extend your credit limit.
Full details will be sent when we
acknowledge your order.

To order by telephone

- phone Cambeney (0276)685311;

- haveyuur uedilccid lAccess,
Barclaycard, lustcard) r umber ready.
It may be possible tc extend your
existing credi: limit Please ask cur
telephone staff for more details
Please do not use this number for
other enquiries.

For more information

Phone Camberley (0276) 686100, or
use the coupon to get a QL brochure.
Due to demand, delivery may take
more than 28 days. You' order will be
acknowledged immediately with an
expected shipment date. Remember
that Sinclair offers a 14-day meney-
back undertaking.

Sent to: Sindair Research Ltc, Computer Division, FREEPOST Cambcricy, Surrey, CU15 3 BR.
Qty Item Code

Item Price £

Total£

Si rclairQL Computer 600C

399.00

Ql Ufc5 Tienbe rihir (ore year) fclGC

ib.UO

Postage & packing [any order o^er 1 390) 6995

7.95

Please Lick the appropriate box-

□ 1 enclose a cheque made payable to Sirdair Research Ltd fo- £.

□ Please chaise my Access/Barclay card Trustcard Account No.

I I

I I l » l l

Signature.

(VWMrs/Mi&s

I I I I t I I I I I I I I I I I

I I I I

_|

Address

I I I I I

III I I I I I I I I I I I I I l l I

I

I I J I I I I

II YOCMQ4I

C Please send me a chart comparing :he Sindair QL computet witn a

D Please send rma Sindair QL brochure

Sindair Research Ltd,StanhoDe Road, Camberley, Surrey. GUIS 3PS.

Small business can now
stop going by the book.

For under £1,000 a small business can now
equip itself with a BBC Microcomputer^ disc drive,
a word processor and printer.

(All tax deduct ible by the way.)

Once you've parted with that money, you'll
find that business has never been brisker.

Because now, there's a new series of floppy
disc software specially for the smaller business.

It has been developed by Acornsoft, the
software division of Acorn Computers who are
the manufacturers of the BBC Micro.

For only £24.95, each disc can store volumes
of vital bookwork which can be updated and
amended in a fraction of the conventional time.

And them is a disc to cover most aspects of
paperwork^J ^^^and hook-keeping.

The Invoicin g package.
This program stores details of products, VAT
numbers and. of course, the names and addresses
I you r customcrs.As orders
come in, you simply record
them, Then, when it's time
to in voice, you just press a
few keys and each invoice

■r

or credit note is printed
automatically in seconds.

Allowing lor variable tcnris of trad i rig, the
system calculates and prints discounts. And it
should help to improve your cash Bow dramatically,

Hie Order 1 Yoccssin g packa ge.
With this program,
you nan confirm your
customers' orders, prepare
and prim despatch notes
and make last analyses of
individual orders or
of all the orders
stored on disc.

. The Accounts Beceivable packag e.

Now, it couldn't be easier to
your customer accounts under control

In an instant, you can analyse
debtors, prod u ee j I i i

\5cco«^^

;

statements, keep
a check on any
credit limit and
calculate VAT out-
, put automatically.

Using this package
in conjunction with the invoicing package,
you can also keep tabs on payments received
against payments outstanding.

The Accounts Payable

packa ge.

This package will keep
s you fully up-to-date
|* on how much you
owe and who to. In
addition, it calculates

input VAT and, used with the Accounts Receivable
package, produces instant VAT returns.

It also highlights settlement discounts,
produces remittance advices and provides an
immediate analysis of all creditors.

The Stock Control packa ge.

Touch a few keys and you have instant access
to stock status and auto-
matic analysis bv quantity
and value.

Consequently, it's easy
for you to maintain correct
storking levels, having an
early warning of out-ol-
stock situations or the likelihood of over-stocking.

-swat-

■■ • "

mm

Average value of the business they do with you, or
whether they are good or bad payers.

Then, when you are doing a mailing, you
simply choose the group or groups ol customers
you want.

At £24.95 each , these packa ges
could ho priceless.
Each package comes with clear instructions
on how to get the program running so that you
can devote much more of your time to more
profitable activities.

I f you re a credit card holder,you can order any
or all of the packages by ringing: 01-200 0200
anytime. Or 0933 79300 during office hours.
(By ringing the same number, you can get the
address of your nearest stockist, or full
details ol the BBC Microcomputer
system if you doift already liave on«.)

Alternatively you can order
the packages by sending the order
form below to: Acornsoft,
c/o Vector Marketing, Denington
Estate,WelUn£borough.Northants
NN8 2RL. Please allow 28 days
for delivery.

® Credit card holders,
phone 01-200 0200. anytime.
Or 0933 79300, during office
hours.

The Purchasin g packa ge.

All your suppliers" names and addresses go
onto the disc. Then they can be retrieved instantly
for preparing and printing
orders.

All order data can be
recalled in seconds, allow-
ing you to cheek on orders,
and suppliers' invoices and
to record all deliveries.

The Mailin g packa ge.

Instead of the shotgun method of sending
mailshots, this package enables you to refine each
mailing down to the customers who are most likely
to respond.

It gives you a rapidly
accessible mailing file of
your customers, according
to any criterion you choose.
Size of company, for inst-
ance, or type of business.

To: Acornsoft, c/o Vector Marketing, Denington Estate,
Wellingborough, Northants NN8 2RL.
Please send me the following business software
packages at £24.95 each.

(Code

\- ■T-11...U

PROGRAM

Invoicing

QUANTITY

TOTAL

use only.)

SNB 08

Ordti Pmceudng

SNB 12

Account* Re:eiv.ible

SNB

Accounts datable

SNB 13

btock Control

SNB 1

Purrttasing

SNB 4

Miiiliiijt

SNB0O

TOTAL

I enclose PO/cheque payable to Acornsoft Ltd. Or charge my

credit card.

Card Number

Amex/Diners/Visa/Aci-es.sO'ele-.e)

Please send me details of the BBC Microcomputer System D
Name

Address.

Postcode^

Signature.

Registered No. 1524763

VATNn.2IS8l23«5
YC4

JCORNSeff

EVERY PICTURE
TELLSASmm

GP50A LOW COSTlJOT-mTRfX PRLMliR

5" width roll printer, -fO cps printing speed. Graphics capability.
All modes can be intermixed on a stngfetine. Alternative colour ribbons
upiional wilh replacement ink n'semairs.

Available shortly is a dedicated Sinclair Spectrum version. £138.00,

ffyou want to make the most of your micro,
sooner or later yon 7/ need to addon a printer. To help
with preparing and debugging programs for
example. Or pitparaLkm of reports. Or cataloguing,
word processing and file listing.

Low Seiko* f ta prices mean you can leant up
with the printer you want sooner rather than later.
The wide range interfaces with virtually everv
computer from a Dragon or Spectrum right up
to Apple and IBM

Designs are sophisticated,
performance is versatile and reliable
and quality is all you *d expect from
the name Sidkoxha.

Get hold of the full picture -
ask for a demonstration at one of (he
dealers oner the page.

bbc microcomputer

GP550A LJUKHE$FV\l)m(E PRIMER

Standard dot-matrix and near letter tjualih •
printing. Print speed 50 cps 'DP) or 25 cps (iSLQ)
modes. 8 fonts. £299.00

CjL commodore

GP 1QOVC COMMODORE

excluspvf; inn -matrix

PRINTER

Built cxdusiveiyfor VIC 20 and &4.
Full graphic printing including all
llC characters. 30 cpspruiting
speed. Supplied complete with
dedicated cable interface. £229.00

' \MW.N

LYNX

CP 700A COLOUR PRINTER

4- hammer impact dnt-nmirix. 7 basic, colours
with 30 colour shades. Unique ribbon arrange-
ment permit* multiple colours in one pass.
Graphics dump interfaces for Apple and BBC
Micro available an options. Low noise (eveL
£489.00

*'.rWxiU

■ ■■-■

GP1 WAS SERIAL
DOT-MATRIX PRINTER

Serial version of the CP 100A. Ideal/or
Spectrum with inicrodrive, New Bruin
andhynx. £229.00

CP500A PERSONAL
DOT-MATRIX PRINTER

A development oj Hie extremely

popular Seikosha 100 A,
50 cps panting speed. Full graphics
capability. Paper width adjustable
up to 10\ £249.00

DRO Business Systems, Peripherals Division, IV 14 Lynx Cretcetlt, U'interstoke Road, flbst r m-uiper-Man\ AvonBS24 9DN.

Telephone: 0934 419914. Telex.-. 444761

Brian Rose

<&

Somerset and England Cricketer Says

Si

"A Truly Addictive Cricket Game 1

• Detailed match
analysis

•Excellent Graphics

• All County and
Test Squads

i f ■

^

<

Somer.

^mersetandEngJandCnTk^;

Ei

C_Jb'

i^r
-«

m

I

**>

rwr

v

THE No.l CRICKET GAME

°%Y&rn©

• Batting and Bowling
skill factors

•One day, County and
Test competitions

• 'Save' match facility

• Many More facilities

Wyvern

+J Software

Everyone buying a copy of HOWZAT before 30th April 1934 will go into a free draw.

The prize is a framed print (32" x 24" ) From the 1 983 Prudential World Cup signed by every

participating player, i.e., Ian Botham, Kapil Dev, Richard Hadlee, etc.

The draw will be made on 25th May 1984 at the Countv Ground, Taunton, by Brian Rose.

THE NO.1 CRICKET GAME

Please complete the order form or write direct - No stamp requi'ed.

OnlV Order Form: No Stamp Required
£5.50 Please send me _ _copy(s) of 'HOWZAT* at

including
VAT and

P/R

£5.50 (inc. VAT & p/p)

I enclose a cheqjeAC. valued at £_

NAME

ADDRESS.

Dealer Enquiries
Tel: 0225 65747

POSTCODE.

Send to:

Wyvern Software

FREEPOST

Bath

BA11FN

Please tick tD receive
detail; of other
programs

YCI

CLOSING DATE FOR FREE DRAW 30th APRIL 1984

Are your finances driving you mad?

Iki vtiu f.nrJ that working oil vnir \
filtanCOt rtiiKcs your head Ijii.v?
Do >uu seo red'

JJnn'1 worry, nnw ym rnnhnvn

.i:.li:ii 'f. )'<T',fina lLiukinf

S'yslem m y jut side. j>ivinn you

a ciejir M?uiisl,.ni ard

| hup; fully | pulli: ■; \iu biu:k

inluthe J.i'i:

Maintain pcmaienl records

finrl full v Hni.-.ilri) ototomonta nf

your finances ♦ Smirch tarHlty.

Bunk Reconciliation nodule

is included to auiomctica \y

mnt :h your BankSlatHmf-M

tu your HIS account.

* /xiii v>: 5(16K]

* ZK SFECTKCM EU.OU(IUK)

* UHAmNV:i2flO(J2K)

' DUC £9.9!; [32K) PBS only
guaranteed after sabs

mtiintunance provided

NEVVRELiASSS

SPE<.rRUM(«K)

^.aoUvFtinsintnKlurnor^

aSassssu

impose, it*n»P » Btos, * w,,(S '

SoveH.rnnlit!

DRAGON (MK) Ei00

I prints rftite - »<> S«:n.«ii ■» P"i"- r

} Memory LocaWU*- ^ "^ AB "

on if R b> ?' **' " '■•" n1 '- '" "" '"' '"*'

PUTITOl/BSELFINTHE
PICTURE HEflE.

KYGLAMJ
.WW

Bristol: Dewcc Compute?
Services. (0272] 7699-t.
Weston-super-Mare:
r.K Supplies. (0934) 418838.

BEDFORDSHIRE

Bedford; Bedford Micro
computers. (0234} 215015.

BUCKL\ : C,ILA\1SHIRE

High Wycctnbe: Kitmdev
Computers. (0494) 449(49.
CAMBRIDGESHIRE

Cambridge: Cambridge
{ ttrtntiler Slow.
■'0223} 35S264.

Cheshire

Fnadahcum Northern
Computer?. ?({)2Sj 85110.

Cornwall

Camborne: \licrvaxid
(0209) $31274.

COUMY DURHAM

Darlington: Dartwgton
Computer Shot

computer omp.
V325)4S74M

CUMBRIA

Caru&Us Iht> Uo/ttputor ufaoB,

'Carlisle, Ltd. 27^10.

DEVON
Exeter: Lkeot. Computers Ltd.
(0392)218461.

DORSET
Poole: Densham Computers
Ltd ?0202; 737493.

ESSEX
Harhuf: Akhtar fastnunenti.

W79;4/2(>.VJ.

GLOUCESTERSHIRE

Cheltenham: The Streen
Seme. (9242) 52S979.

HAMPSHIRE

Portsmouth; Advanced Digital
Services. (0705) 823825.

HERTFORDSHIRE

(Id: fori: Cat ill irtter Plus.
W>3} 33927.

HUMBERSIDE

Htdh The Computer Centre
(Humberslde)tui. 26297.

KENT

Bromley; Kent Computers
and Communications.

01 -464 6533x72.

LANCASHIRE

Blackpool: Bktckpocl
Computer Stctv.
ftmSrJTWi/WW)
IJumlcv: IMC Computer
Centre. (0282) 57411/54299.
Lctiuxtstcn Qxstlc Computers,
(0524, 61133

LEICESTERSHIRE

Lettresier: Amide Computers,
Leicester 532991.

LONDON
Elthatn: Vie Advanced

Technology Cattle.

01-859 7696.

LINCOLNSHIRE
tJrutttUim: (htkhaf
Computer?. (0476) 76994.

MANCHFSTTR
Su/niock Electronics:
061-834 4233.

MIRSF.YSIDE
I jjrrpoot: Sjiecudixt
( output er Cent re Ltd.

051-2363499.
NORFOLK

\nrieirh: Si unlock fhtinam

(0603)617083.

SOIT'INCHAMSHIRE

Nottiiijiham . ( hiuputer
Market. (0602) 58454

OXFORDSHIRE
Clipping Norton. Cttstwld
Computer?. (060%- 41232.

SALOP
Telford: The Computer
tilhire. (0952} 50466.

SOimi YORKSHIRE
Bamstey: Comtec.
(0226)46'172.
STAFIXmnSHIRE
Stoke-on-Trent: ( otrpuier
Cabin. (0782)656911.

SURREY
Croydon: ^tsonstore Ltd,
01-68 ! 7539.
KiJigston-iipo:r-'Ihames.
I isttmMort Ltd. 01-546 8974.

SUSSEX
Horthi-tg- Worthing Corrputer
Centre (0903) 210861

TYNEAM) M / EAR

Gateshead' H. C. C.S.
(0632)821924,

WESTMS)LAM)S

Birnitighcm: Specialist
C. amputer Cetitiv Ltd.
021-6434743.
Cneeniiy: Coventry Micros.
(0203)58942.

WEST YORKSHIRE
lintdfwtt: Liter. Coatoutei's.
(0274, 722512.

Leeds: MicrtHV.U.

(0532,449722.
WILTSHIRE

Westbury: Etxrymar.

Computers. (0373) &64m4

SCOTLAJND
EDINBURGH

Mkroworid: 031-228 1111.

CJASCOW
Microworid: 941-332 1116.
WALES

CiRDH'T

CardijlMtcmt: {(£22) 373072.
GWYNEDD

Ab'rgete: Altengele Computet
Centre. (0745 'f 826234

«5K

HILTON

COMPUTER

SERVICES

Hi.lun Computer Services Ltd
(!>*pl Vr) 14 Av.-ikm Prmtl.
Orpington. Kent ERG 9 AX

Aik h; *ihc PBSul yiur Im.ii i:uti[iut;i*l(i:p,

YOUfl COMPUTER. APR L 1984 41

ABF

PROGRAMMABLE

JOYSTICK V

Spectrum

^

or ZXB1

AG !• P KOG RA M M AB LE INI E Rl ACE
Recognised as the only true Hardware
Programmer: joystick interface this orodue.
offers all the features associated with such a
design.

You can use any Atari-compatible ;oy?ticfc
controller with any software for your Sine-
loir Spectrum or ZXS1, not just thosa with a
joyst.ck Dpt.on.

Movement of the joystick is recognised by
the computer exactly the same as pressing
tl e appr jpr.ate control keys, and can there-
fore give the inos: immediate resprmsj to
that movement. The hardware programmed
d«sigi wnrl(« with all possible kcy-rcaJing
methods, both BASIC and Machine Cod;.
Eight directional movement, whh or with-
out ihe fire button being pressed, can he
achieved by only programming the left,
rijht, up, down and fire keys requirec by
the game.

Programming is ach.eved by a two-digit code,
which is looked up on the Programming
Ciarl supplied, for each direction and firing
button. These two niwhwi are then sel.
ected on a pair of lezds which are clippec
onto appropriately numbered strips on the
interface.

Once configured this can be marked onto I
Quiet Reference Program rring Card for
storing with the game. As the pogramning
is not pewer dependent the interface can be
immediately used when next switched on.

The keyboard remain; fully functional and
cui be usee simultansninly with the joy-
stick.

An integral rear expansion connector means
there is no need to remove the interface to
connect other psripherais.

NB. A recent desigr, improvement now
means that the AGF Pogrsmmab e Interface
works with tlw r.ew Quickshot II ttpid
"AutD Fire" feature.

PACKAGE (OMEN IS SUPPI IFI)

• Programmable Interface Module is illus-
trated, complete with clip-on piognm
raing leads.

• Self adhesive programming chart detailing
hew id define whici key it simulated by
UP, DOWN. LEFT. RIGHT, md FIRE.

One pact of ten Quick Reference Pro-
gramming Cards for at-a-jlar.ee setting
to your games requirements.

12 months guarantee anc full written
instructions.

KEY FEATURES

* Programmable design gives TOTAL soft-
ware support

* Accepts Atari, Competition Pro, Wico,
SUrfighter, Quick Shoi, Le Stick etc

* Rear extension connector for all other
add-ons.

* Pre* demo piogTjm and Instructions.

16.95 fj

+ eipap

NEW IMPROVED GRIP : BUILT tM STABILIZING SUCTION CUPS

TRIGGER FIRE BUTTON : RAPID AUTO FIRE SWITCH : TOP FIRE BUTTON

FROM: MR/IVRS/MISS

ADDRESS

SEND C.W.O. (NO STAMP NEEDED) U: A.G.F. HARDWARE, DEFT.YC.

FREEPOST. BOGNCR REGIS, WEST SUSSEX, P022 9BR.

QTY

ITEM

PROGRAMMABLE INTERFACE

ITEM PRICE

27.95

TOTAL

JOYSTICK(S)

17.95

PACK(S) QUICK REFERENCE CARDS

1.00

ZX81 □ ZX SPECTRUM D Please tick

IJF4 I.F.R ENQUIRIES WELCOME EXPORT PRICES ON APPUCA TION

F NAL TOTAL

£?•«

, ,

*, ■ 'A

omputer Graphics Language

1^ A,VERY POWERFUL, TRUE
MULTITASK LANGUAGE
^k AS FAST AS MACHINE CODE
^SIMPLER THAN BASIC
Write Machine Code in a

required

SCOPE is available from SCOPE HAS TO BE USED

most good quality TO BE BELIEVED

dealers and selected ™k spectrum

branches of —

* wnsMrni / /

, For details df how to get / J \fi

-your games poblished / V

lercially contact /( -

'tig J \L^

TECHNICAL SCOPE is a fully structured
DETAILS multitask language specifically

for writing graphics, animation and sound.
Being fully compatiole with BASIC it is ideal for
writing both arcade and adventure style games.
Additionally, with SCOPE present in high memory
it can be used as an assembler with SCOPE words
as plain language mnemonics. Therefore no
knowledge of machine code is required.
The language is extremely easy to A

indeed providing many features
not available from BASIC.

WW

mm LETTERS.

SINCLAIR'S NEW Q-LENGTH

/f inciair seem to be going down a familiar path, one wo.tld have
^ thought they'd hnve learned by their experience with the
Spectrum — but no.
On Tebruary 13 I rang the enquiry number 0276 686100 given

n t.'.e QL brochure u> enquire what the current delivery situation
xas. I was told it would be 28 days from receipt ofoidei v aj this
was rather importan*. to me I asked if the lady was ibsolutcly sure
about this she replied "Well it could be as much as five w;ek4,
'.vould you like to order one now? 1 ' I did order one bLt I am now
■.vonderint,' if I did the right thing as what 1 was told would now
Seem to have been a blatant lis.

According :o recent article;, ir. computer nogjaincs- Sincla.r
'.vert in fact in the process of sending out letters to people who had
already ordered to say that there would be a delay n delivery.
These letters were already in the process cf bein| sent before I
ordered, it se^m:- that the pecple who ordered in the first week
will not receive their QL's urtil the end of April, that docA not
gtvt rru much chance before the ;nd of Msy.

I thick it is about time Sir Give started to treat his customers
with just a little more respect instead of abusing their faith in his
products. It is now two weeks since I orcered and I have not even
received the cDnfirnuticn of order which I \va3 -.old woulc be sent
in a tew days.

If I knew from the start thai I would hive to * ait 1 2 wteks thai
would be fair enough. 1 fee sure all customers would prefer to be
told the truth right from ih_- start ihd plan accordingly — there is
no excuse when they knsw full well that they arc not in <i position
to deliver n the stated lime.

Bryan K. Lee,

Nttnecton,

Warwickshire.

MANIC MINER

/was rtrobing ihroLgh Manic
Miner the other day and 1
encountered a finlasnc "Bug". It
prnvei thai it is perfectly possible to
choose any of the 20 -taecs to look a:
and-'ot he^in i game on . -

It tj-.vol.'ov :yping in ■ sequence of
neinb:rs at the siart of a game these

arr as follows:

60 3 1-7-6-0

A boot identical to the one tha:
sujashes you ai the tnd of unj
normcl game then apyturs at the
bOUOCt left uf the screen next tc the
dancing fi^ur-.' of Miner Willy.

Then vdu press a combination o:'
numbers :o sdec: th; stage desired,
Fcr eMamjIc:

To begin Ml the 20th Stage, the
tour niiicbers; l-2-=-6 hav: to be

h«IJ down oil tit once und rcL-ustd y
the sane inu.

Vo'j will then begin on the 20th
stage!

To se'ect other statics Mich

combinations as £-4-6 have to be
pte>sed. By trial and irrot all can be
selected at any one time. Hu: all ol
them contiin a 6 and njne of the
numbers are more than 6

Ben IJarJyimut,
CUtphtm,

I.tHlJo.l SWd

MONSTERS' LAIR

Jhf/hh regnd lo my Atari program
ff\[ Mcnsurs' Lair which appeared
in the February issue of your
magazine it woulc appear that two
lines hew becc me corrupted in your
printed listing fom the supplied
tape. In addition the inverse
characters have not appealed in their
cor reel form in ihu nngazine. !
should therefore be grateful if you
eouid publish th: following
coriccrivc j.r.Jv willliu tuui pa^es
at the earliest opportunity.

Two lines hnx corrupted dur.ng
the printirg process. The correct
vercum art shswn below:

Lino 710 If PEEK i832KM6 THEM

BONUS BONUS - 1 SOUND 2.20"

tPRlZEXh.O.i&SOUND 2,0,0.0 IF

BONUS =7S THFrv? GCISUB

25:EONUS

Lint; 3500 >"AAAAABBBAAAAAA

CCCA^AAAACCCAAAAAABBB

AAAAA";

But replace 'A' with a norrral %

replace B' with an nversc control R

n:[>i; ::i: C' with a normal space

In addition ihe following characters

should be printed in inverse fcrm as

they appear in ihe isted lines:

tine 20 »

Line 62E

(within the quotssl

Line 15C-0*

Line 3840 SHLD ■ 20

Lme 3840 ban

Line 38S0*

lme 71 10 d:(f level

Line 7 1 10 iritialise
Line 72C0 h' Utilising
Lino 72CO mm
Line 80£0 lair
Line 8060 energy used
Line 8070 time :aken
Line 81C0 OPTION
Line 8 ICO SELECT

The notes regarding inverse
characters aie quire impomnt on the

Atori ntach.nc ain;e they eontrj]
colour and are reqjired to balance
tie screen display.

Dave Hiiiticw,

Ltac&ihitt.

PROGAID BUG

Ajf^' 7.X-K1 prctfrrsm Piojtaid

fwf published i i March com ims a
bu^; tehich vill caufe the progtam to
enwli if Merge is ImplcoKiUcd in
Slow made. It will however wok
properly in l-\ist.

T* cerrett tie bug three extra
bytes have to be insjrted in the
Istirg at lCfi23. The three missing
hies aie CDE702 aid their in-
sertion means tnai everything
between 1662) tn ihn pnrl, 16037,

bit iv ba thi'ted three tytej down.

The progiam will now be 402
bytes loig ending at 16940. In
addition liter .ddiessts <>fthc facilities
RT-Dowi, PGM-SVR and Merge
will be reduced by three tytes.
.Merge, lor exoaple, mw starts a
52450 imtcad oJ 32-153.

.Hben Olnx-K,
Gibraltar,

ORIC ADDRESSES

//.ning read S. Ttghe't let'er in the
Wm November 1983 issue of Your
tttiitjiti.t which lifted so.-iid Oric
memory addresses. I thought thai
those readers who ftrc Orics,
cipeeijllv these liltc ii « v sell" wIhj

enjoy dabbling A'itl. machine code,
nay be interested in i few more
addresses srorn KOM routnies:
*l : 4!2-|'IN(i"
#F4I5 'SHOOT*
*1-'4I8 'BXPLODE'
* 1-4 IB 'ZAP'
#F41E •SOUND'
#1-'1JI T'l-AY'
#1-I21 'MUSIC
The pirun-eters tor cht list hrce

commands shoidd be placed us a
Series of tWO-bytc intej-'crs, siarting ;t
location *2:-:t (T3 t ), in the ianie
older a*, br Basic, before linking n
the routine with a JSR.

Also, lour of the locations listed in
the iifoiemcntiohed letter, have
another twe which the author did net
eive. l.tKations #26D and #26b
(621. '2} contain ihe start address cf
the scivi.ii (nor.iiiil.y 48000), and
#26F (<"i23) conialiU the number cf
lines in the serol'.ed area of memory
Dcerejsir.g thu bite and .i Uii ;_ iu
the former — in inciemeiits of 40 —
creates a "window" on tht display
snniu^ at Ihe address held in
location 621/2 consisting cf i
nomfcer of lines determined by th:
antcnls of Iccatx^n b23.

This protects the rest of th:
ettsjil.y from overprinting and

HELP TO COMPILE GAMES TOP 20

yn all micro owners. Have you bought a pre-rscorded cassette
§ lately? Wha: standard was it? Whatever your answer, this

purvey is for you.

I want you to send me a list of your top 20 games you've played
on your micro — Vic-20, Oric, CBM 64, ZX-81, Texas,
S(.:ect.um, Aiari. ERC R> and Dragon. I don't nind if it's ycur
cassette or not. All! want to know is yout favourite 20 games in
order. Please state the msnnory rccuii:d iud th; uoiiipuuy who
makes the game. Do your list for one micro only. Please state
which dp your .ist and on ycur envelope,

We will' then analyse the results which will than Se published
later on. We wi.l bi able to find the tup 20 game? for etch ofihc
top selling micros.

This will be one of the biggest software surveys conducted in
any o:*the computer books on sale in any neusagen:.

Please incHuds your name and address as 1 lope tiat some
software hoi.scs will donste some cassettes as pr.zes. "llie prizes
will be given to t.ic pct>oii whu't ei.Liv is closes! tt) the one
published, if no one is correct th^n the games will be wi:held and
added to the pr.zc next timt.

We ha/e already completed a small survey using magazines.
schoo.s, youth anc cemputer cubs. Please send entries to the
iulknviuK uUJrcssei:

Nigel St< iwtt, lSCJaypole Drive, Not; hboroxgh, .Peterborough PES
9BW or Chrs Malion, 4 Clare Roaa, Nortkbowitgh, Peterborough;
PB6 SDK

44 YOUR COMPUTER, AP^IL 1 984

scrolling;, nut to change tie colour of
onlv the window it is necessary to
Poke 619 with :he required back-
ground attribute — or any other
eh lr;nlf r — ;inrt hi Prki* fi20 xirh th<-

tat«groun<3 attribute, then to CLS
This lechnkue can be used to
protect beading) or l« put text unikr
a picture without writing over it.

Two more location; which may be
useful arc 5il and ■> 58 which contair
the hi-res X ;nd Y co-ordinates ant
can ilierdore be used in testing for
out rr range parameters with the
Diaw or Cunnov connunik

AitJtvK .7. Rdghigtm,
Nomkh,
Hnrjaik.

MiLLIPODS

/n the March issue of Vow
Computer, thrje errors crept into
listing 2 of jMillipodi:
210 IF ASC(8$}>eO THE^J elc
230 C ■ 3-16

250 IF ASC(B$)>eO THEM = etc
Peter Tom sou,
Tautwarth,
StafJ 'intsltirc.

TUNNEL RUN

Jfrwple wht> have entered my
^^ progra.it funnel Rur which wai
printed in Software File in the
.March issue will have cat an error
when running it. This is because the
text siys .he (it character should be
typed instead or' the £ character. Thit
would ba\e been correct .1* my liitinj:
had been med hir hscatise you
printed your own it ij nor.. TJu
correct character to .ie typed is the
hash synriol. The lines which will
need altering are 410, 1480 and
1750.

If you wish to .nake suge 2 of (he
paste harder enter rh* line 78S
M2 = 6. This wil. give a rod* to the
tunnel.

M. Severs

WatioiHw ■ Tliames

Swrey

STOPPING COPIES

Ajfwy people that mak: their awn
ffn programs and .cnc tbem tc
friinds at ii-enr.ua. ly Kel! tVUMC
become surprised with the quick
proliferation of unauihonzed cqiie;
ol'thcii own wyil.

For owriers of Spectrum irachine:
I trill suggest, a smat tri;k that wili
nuke any user have n sweat inlinut
hours of pain and frustration to cop\
a private labc program.

The iion-mergeiblc'non-stor:
locder If your programs arc in
mvrhiii'-rnHe \nxi rhr»m Through i-
Basic hei.dcr-cone loader of the
(blowing type:

1 Poke Vol"23785 ". Not PhPoke Vo
"23659*'. Not PI

2 6oTo Val "9999"

9390 3onr> to ta« the 'O.idoi

9995 Poke Val , -23785", Va

"255": Save "Loador" Lne Va

"V'rStnp

9999 Rem Insert here LOAD"", it

Basic or Lojd "'Code: Randomize

USR Address t M-'C.

JoseAkvrto P. Pa<coa,
Lisbon,

Poruigal.

EDITORIAL

While QL delays may be bad news for the early
orderers, they could b; a blessing in disguise for
the rest of us. Eveiy time a new wonder machin:
appears en the market the supply of software for
one of the old favourites seens to dry up.

The rr.illion-plus ZX-81 and Vic-20 owners
already know what it feels liks to be left out in the
cold. The flow of commercitl programs for these
two old-triers slowed to a trickle soon aftei the
Spectrum and the CBM-64 had arrived in a bij
way, and as the software houses turned '.heir
attentions to these new rising markets.

What interests the program-makers are computer
users and not computer owners. The hundreds cf
thousands of Vies tnd ZX-Sls did not just vanish
overnight. They either became second-string
machines as their owners moved up at tname to
larger and more sophisticated micros, or were
judged by the soitwere manufacturers to have
passed their first year of use when most money is
spent on buying programs.

Those who stuck with these machines from the
outset and those who bought one after their sales
had reached a peak are rewarded with a dwindling
choice of programs: software houses prefer the
areas of increasing demand.

The programming effort that goes :nrn a new
computer is enormous. It often pushes the micro's
capabilities well beyond the original expectations
of both manufacturer and public. Compare, for
example, the quality of early Spectrum software
wirh what an fc-c achieved trday.

Machines that are in decline do not receive that
kind of attention. So not only is no progress made,
but they actually go backwards relative to the latest
micros. As this software gap widens between old
and new machines, yesterday's computers become
even less attractive to buyers.

Add to that the fact that commercial
programmers arc just as subjeci rn rhc whims cf
fashion as the average computer enthusiast.
Professional program writers prefer to work on the
computers that are in vogue. Not only will the
royalties involved be higher but the end product is
mere rewarding. We may End our present
generation of Spectrum programmers drawn to the
QL by the pull of its 68008 processor.

In the mercurial software market the program -
makers feci they must be seen to be up in the
forefront, servicing the Iatesr technology. Even if
there is still money to be made in the Vic and
ZX-81 markets, software houses arc afraid to be
branded as behind the times ty providing new
programs for them.

They also maintain that as well as the dirTioilries
of selling software into the static or dying markets
of the older machines, the volume of pirated
packages that accumulates once a micro has been
around for a couple of years makes creating new
software a pointless task.

In any :ase the b:g multiples like WH Smith or
Boots have the final say. Faced with the choice
between an excellent new Vic program or one for
the C3M-64, the multiple would choose the one
for the newe-j hener-selling marhine. That would
leave the software house with the fading mail-order
market as its only other distribution option — not a
very attractive prospect.

The acres of shelf space in the growing number
of sofrw?.re Riipernar'-cets rray offer owners of
classic m.cros a ray of hope. Picture dropping a
software flavour of yester-year into your Saturday
morning shopping trolley. If that fails to become ■
fact, the image of QL owners in a few years
reduced to ferreting around in jt:nk shops for rar*
programs may be a small consolation.

How to write for Your Computer

We called this magazine Your Computer precisely because we welcome your
views, tips and hints and even your criticisnr. of machines and software in general.
If you would like to see your name in p'int, whether on a Software Filo program or
a full-blooded article, here is how to go about it. Ideally, all articles should be
typec double-spaced on one side only cf uniform sheets of paper. If list ncs can
be dumped directly from a printer - you can always use a friend's or user group's
— this minimises the risk of error. In a perfect world a cassette would
accompany the article. That considerably speeds up the checking process. Not
only do you get to air your own discoveries and opinions, but we will even pay
you for the privilege. We pay £35 per published page — that's as it appesrsin :he

magazine and includes illustrations.
Why not give it a tryr 1 You have noth ng to lose but your postage.

ABC

Editor
TOBY WOLPE

Assistant Editor

MEIRION JONES

Staff Writer
SIV1UN BEESLEY
Production Editor

IAN VALLELY

Sub-editor

PAUL BOND

Editorial Secretary

L V NN DAWSON

Edito-ial: 01-661 3114

Subscriptions: U.K. £10.50 for 12 issues.

Printed n Gteat Britain for the woptelOiS

But'ines? P'ccs IrtemBtianaJ J-td, QL&drant Hiueo, The

Quadrant, Sutler. Surrey SM25AS. Tel: 01-361 3500
Tolsx/goms 89/084 3IPRESG ISEN CK63-C385.
Printed uy Rversda Press Ltd, WhitsuUe, K9nt, snd
tyrvwit tiy Irstfin 1 .trt, I nnrlnn : C1

Advertisement Manager
SHOBHAN GAJ.AR 01-661 3127
Assistant Advertisement Manager
NICHOLAS R ATN I EKS 01-661 8548
Advertisement Executives
NIGEL BORRELL 01-661 3660
JULIAN BIDLAKE 01-661 84B3
KAY FILBIM Ct-661 B4£4
Northern Office
RON S0UTHALL 061-872 8861
Advertisement Secretary
JEANETTE MACKRELL

CLAIRE NOTLEY 01-661 3036

Publishing Director

CHR-S HIPWELL

Your Computer, Quadrant House. The

Quadrant, Sur.on. Surrey SM2 5AS.

© Business Press International L:d '98-1

YOUR COMfUTCrt, APRIL t S04 45

MEWS.

Hungary for a
take-away

CHIMBSG JtfGGLSa is the first
ccuiipurcr game from Hungary It
runs on ihc Coomcdore 64 and is
sold in Britain by Ocean Sufiwaic for
£c90, Juggler won an ideas
competition on Hungarian TV and
wis written by a mathematician., an
arise and a musician.

Don't call me Elan, Flan, DPC or
Samurai — just call me very late

SriUNG will be a little late for the
Enterprise this year. Chip delays and
yet another change of company name

Shaking all over
about the pirates

K:ck Alixander of Virgin Games is
accusing the Gcvemment of
"*ndcrsirg and givinj actual support
to computer pirates". This follows
th: Ministry af Defence ban on JLC
Duta using ° new an:i-piracy system
on ih: grour.ds that it might r>e a
threat to national security,

More 6502
for Acorn

Acorn is finally rclcas.ng its 6502
second processor for the BBC Micro
which also gives at least 50K of use"
memory in any graphics mode,

Nick Alexander is asking the
Government to "compensate the
games industry for th-j £100 million
theft which there is every chance this
new system could prevent". At the
same :imc the Guili ui" Sjftvarc
Houses is :ryhg to persuade
magazines to {top pub.ishing
advertisements tar copy-cat
prcgrams.

Brtice Eversss of Imagine calls for
the Government to change the law so
thai computer pirates can be treacd
in exactly the same way at video
pirates Other figures in the record
anc software industries are calling
for a levy an blank ctsscitc iapc>.

Shapes of things to come: The 16-bli Grid portable, above, wh<ch
was js&d en the space shuttle with its 255K RAM, 084K bubble
memory and buili-ln Modem and flat screen ! s probably what a
typical £300 computer will look like in a couple of years. Below,
cheapest bubble memory 90 far, £600 fu a 126K unit to plug IfitO
the IBM PC.

mean that the £200 computer will
not ne released :il! September instead
of April as originally promised.

Last Feptcmher when derails of the
micro th»n ca.lec" the Elan
Enterprise were released its ultra-
high reeolLtion, nosfive range of
colours, 64K RAM, built-in wcrd
processor and joystick seemed die
:deal hame ccmpuier but it had
already had an unfortunate problem
with its names. In the early days of
the pro;ect wh.ch was managed by
intelligent Software it had been code
named DPC — damp proof course —
but it was first advertised as the
Samurai Home Computer. Legal
action by mother micro firm called
Samurai forced a change of nane and
after a brief flirtation with the name
Oscar the company settled on Elan.

Unfortunately, Elan Digital
Systems of Crawley were less happy
with th* name the makers ot the
Enterpr.se Marketing Manager Mike
Shirley told a gullible computer
press that he was considering
charging the name to Flan bit the
company is actually ne*otiatin> with
an Amejican firm to buy a new name
with a futuristic Space travel ring
about it, N'imti like Apollo, Gemini
and Mercury have be;n suggested.
The change of name will delay the
vhulc project b:cau« here will have
to be some retocling and chang:s will
have to be made to manuals and

Easy one for
pocket desk

Easy-Onr it an attempt by Elkm
Electronics to :urr. the Snarp PC-
1500 pocket computer into an instant
work desk. It contains Calculator and
Statistics, programs, a 400 word
Notepad, an Alarm which can
cisplav short messages wh;n it
sounds such as "RWG DAVID
NOW", Text a mini-wnrd proressir
and a htndy currency and measures
conversion program. Easione costs
£25 on tape and it requires an ?K >r
16K RAM mocule and the CE-150
cassette .nterfacc.

advertising materials

At the same time there have been
problem* debugging the ambitious
Nirk and Have video and sound
cnips La ihe Enterprise. The
computer will be built by Welwyn
Electronics at a plint on Tynesice
which will create 9C jots.

What WlfPstrr, Morris — the
nineteenth century artist,
writer and craftsman would
have made oi digital watches
or Interior designer programs
for 'he Spectrum is perhaps
fortunately unknowable, fie
found 't difficult enough to
adjust to the mass production
of tne Victoran age out the
Institute oi Contemporary Arts
is celebrating the 150th
anni/ersary of his bi*th with an
exhibition including a
computar gen&r&teo imag9 cf
his Red Hojse which can
disp'ay 16 million alfferent
colours — presumably
tncftding red.

At the same time Ricnard
v/imams has se' up r.is own
cottage Industry producing
Spectrum Interior Designers
programs which allow yo\) to
try out different layouts of
furniture on screen. Phone 061
440 0333 for Richard Williams.
The 'CA exhibition is on at the
A*a// in London tl'l 29 April.

40 VOUR COMPUTER, AP^IL 1984

Mem.

Microd rives
but no QL

Evek I? Sinclair holds to his
promise and supplies the fust QLsto
customers ihis week most cf trie
thousands of people who have
already ord;ret w.l! havt to wait
three or fottr months .nstead of 28
cays for delivery. Sinclair is already
quoting delivery dales well into Juie
for those who sent .heir orier forms
in at the end of January.

A tew QL; which have fcunc their
vay out by backdoor means and with
incomplete ROMs have been
changing hands for high prices
behind the scenes as software houses
race to be the first to prcducc QL
games and appl.caions.

That's no tape recorder —
its a mass storage system

Two mew high-speed tape drives, the
£60 Ultra-Drive uid ths £120
Fteopy, c.aint to offer dhc-style mass
storage for a fraction of he price.

If the claims sound familiar from
Sinclair Mieiodr.ve advertising thai
is because the technology if. f.imilar,
Phloopy, from Phi Mag Systems in
Falmouth uses a continuous loop of
cape in a cassette which passes a nine-
trick recording hesd. Un:ike the
Sinclair the tape is not twisted over
or. itself.

Eight of :he tracks carry daw
limine each a cassette a capaciiv of
100 K. and the ninth tracks "or error
correction. Phi Mag claims an

average aeccis time of just three
seconds aid with a data transfer rate
of 10K bytes a second ,t tikes just
iinuiiici itijce seconds to load a 32K
program.

Ikon's Ultra Drive which uses a
conventional Philips mini-digital
cassette is slcwer but costs only £80
as opposed to £115 for the Flcopy.
Access times car be as slow as 90
seconds bul capacity is 200K per

International links of
Spectrum mob

After designing everything from
guided missiles to robot submarir.es
you might thine that inventor Brian
West would find making .Modems
for home computers rather
unexciting - bjt not i bit of ii.

H s new Spectrum Mcdcm will
allow you to transmit programs or
play interactive games with other
Sinclair owner! abroad or in other
parte of the country. He has spent

the .ast month test.ng the new half-
duplex unit with connections
between his Br.scol base atid
identical machines tn London, Paris,
Lisbon and Copenhagen.

Micron Eye for the Commodore
64 adds vision to your
computer. Deteiis from ESI
(0256) 57166.

Brian West is no! the only one
producing new Moderr.s. This
l$ Minor M'rades WS2000

Brian West started by prodjeing
simple £.50 tcoustic couplets for the
ZX-81 and SjCLitum uudei the
name of MicroMyte, His new unit
uses a half-duplex Modem which
senses how good a telephone 1 nc is
and adjusts its speed to send the data
as quickly as nossib e.

At first it tries to send data in
Mocks of 500 bytis each with a
checkftuan to make sure chit
interference on th; tine has not
caused errors. If after three tries it
cannot send a block through i: will
change down a gear and send data in
blocks of half that size. Eventually if
the line .s bad enough it will go alJ
the way down to 32 byte blocks.

In practice Brian West finds that
except in the basiest periods when
the telephone lines ire noisy he can
send rlali ar rnp speed in tOO bytr.
blocks though on some interntional
lines the Mjdem changes down to
quarter speed.

cassette, Initially Ikon, on 039-421-
5 1 ?, will produce Dragon ard BBC
versions of the Ultra-Drive with
Oric, Electrcn and Commocore

variants to follow in the Summsr.
The Fbopy is BBC only but Phi
Mag hope to make ether versiens
avai.abl* later.

Jupiter Ace, Forth micro at
a third of the price

At usss than a third oflts original
price the £26 Jupiter Ace being sole
by Boldficld Computing beccme; the
cheapest home compucr ever sold ir
Britain. lioldilelc is selling off the
remaining stocks of lupitcr Cantab
which went intrj liquidation last
vear.

RAMpacks and software for the
Forth basad computer are also
available which may chc:r up any
owners who are sickened at ;he
thought that they paic £89 fcr their
Aces less t.ian a year ago. and now
fine themselves without support.
Boldfie.d is on 04S7 840740.

Vadas is what Voice input of St Ives is calling its new speech
activated room designed fcr tne disabled. It consists of a voice
Retry cennectod f n 3 micro with a dine irkR whir.h allows a
disabled pe r son to use a cassette player or dial a phone number,
open or close curtains and turn on and off a fire, all without
touching anything.

YOL.H COMPUTER, APRIL 98-1 47

M East!

MASTER MACHINE CODE
on your Spectrum

MASTERING MACHINE CODE
ON YOUR ZX SPECTRUM
Toni Baker £9.95
The 3 1 5 -pace bock is cies.gned to
teach you the essential elements of
programming m machine cede.
Written by Toni Baker author of
the highly successrul 'Mar.enncr
Machins Code on the ZXB 1 ', :h:s
new book assumes absc.utdy r.o

previous kr.owktdge of machine

code v/ha:scever, and yet
promises to take you to a '.eve'
of proficiency beyond your
wildest dreams. Starting with
smp e addition and subtraction
you'll be slowly gulced through
the entire subject of machine
XB, The book explores and utilises :he
incredible spaec at machine cede, g.ving you real rime
graph.es games like 33EAKOUT ar.d leads you up to a full
working DRAUGHTS program. Among other isefn! skflb
you'll acquire the ability to create music in real time
(irr.possib.e in BASIC) and to plot m high -resolution graphics
taster than you wou.d have believed poseible

SPECTRUM MACHINE CODE
MADE EASY

Volume One — James Walsh
Volume Twc — Paul Holmes
Ti wa« iwo buoki: pi j vide c graduated
course in machine code programming
or. the ZX Spectrum Book one starts
off with the casic concepts of
mechr.e ccda, followed by an
explanation of binary maths,
hexadecimal and base conversion,
leading as quick y and painlessly
as rossibls or.:c the rules and types
of addressinc the Spectrun's

powerful Z80 microprocessor. Bcok
two is designed for those who already
understand the rudiments of machine
cede programming, and new wish to
increase their ski Is.
Each book is just £5.95

iSffiemoM

'..^'.■"•"riio i

THE SPECTRUM MACHINE
CODE REFERENCE GUIDE
Miciodrive, Inteiface 1, and
ROM DiscBuembly
Richard Ross-Langley £4.95
This 170-page reference work
for Spectrum machine code
programmers contains a full
disassembly of the Spectrum
ROM, with details of the
Microdrive and Interface 1 .
Futures o: '.he disasssmbler
include; Zibg mnemonics are
used, eg LD A. l'~L) instead of MOV A, M,
relative jumps chow the signed cecimd offset auc the
result; hex values ere default and are printed without suffix;
decimal values are preceded by a dusor minus sign; and
sune restart instructions ere followed by data bytas. 1 he
absolute addresses of ail system /arables ana severe!
important routines have beer, named, using whers possfole
the stancarc names shown in the manual. The chapter
headings in he Microdrive/Interface '. jecuon ot be bcok
include the RS232 Interface: Microdrive Channel data;
Local Arsa Network: Network Algorithms; System
Variables: and & summary of lunations. This book is a
mast reference work for scr.oui Spectrum machine

code programmers.

Interface Publications, Dept YC, 9- 1 . Kensington High Street. London WB 5NP.

Please -end me the following books. I enclose £

□ Mdsierlr.g Machine Code on your IX Soenirum — Tow Baker
- £9.95

□ Spectrum Machr.e Cede Made Easy. Volume One for beginiers —
_ jV.iesYVa'.sl.— £5.90

D Spectrum Machine 7lc.de Made Easy, Volume .wo for advanced

_ procrarr.mers — Paul rlclmes — £5.95

— The spectrum Machine Code .Icteentc G-.Js —

Richard Ross-Langley — £4.95
n Creatine Adventures on your ZX S?ec:runi — Peter Siaw and

kx.ee MbrtlatnA". £4.95
3 Putting Your Spectrum to Work (incUldas 15 major programs,

including a v/crd-processc! and spread-shee: ralculafons) —

ChrnC:,ferH^r_/.4QR
D Creatine Arcade Games or. the ZX Spectrum — Daniel Haywood
^ - £3.95

_J r'roorajr.mir.o Your ZX Spficlr.i-n — KnTtrwII'lanes — £6.95
_j 60 Games ar.cl App.icalio.is tor the ZX Speman — David Harwcod
_-£4.95
_ Beyond Simole BASIC — Delvr.o Deeper into your ZX Spflcstnim —

Dilw/n jor.es — £7.95

□ lnslant Scectrurr Procrcmrr.r.a (tape and hook) —Tim Hertnell

-£4.95
D 22 SiTicb Electronic Prqeo:s ior the Spectrum — Stephen Adans

- £6.45
D 'bianl book d Compute] Games — Tim Hartnell — £7.95

Name:..
Address:

IfTERRKE

PUBLICATIONS

We're the experts!

All bcoks available from computer end dccc stores including W HSm ths. Menzies, and Dixcns.
Trade suppled by: The Computer 3ockshcp 30 Lincoln Road Chen. Birmingham B276PA (G2f "J07 ?5i4. tafex 334361 )

48 VOUR COMPUTER, APRIL 198+

news.

Philips new £70 12in. mono-
chrome compute? monitor
keeps the family 7V clear for
Coronation Street, but at that
price it la competing with
larger second hand colour seis
for a place <n the computer
room.

met

S8£

)

in

utMsl

Oft

TL

PF

Company

Zu

Mjchhe .

■^ttt Aide

U lirni'.C

Spectrum

■■Jooqsboc

. Q:i<ck»ilva

CBM 6^1

■Covoths

Gintfesof:

Awri

Khafka

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OK Mugsy we've put Sherlock
Homes on your tail so watchout

Mpi.rot:rnf Hocsf/s staff weni
crazy when Manx Miner cime out
last year — "we lost a week of

progrommer tim* when that come
out" confesses company boss Free
Milgrom. What with that ane
Ultimate Play cne Game's ar:ade
style graphics Miigrom had to admit
that "these games were technically
far superior to what we were coning
up with".

To be fair Melbourne House hac
produced j similar effect on t.u- ether
softwire house* with its cult
atWntures; like the Kobbit tut Free
Milgrom is determined to get '^aci
on top In arcade games too. The first

M.:^c is lo mix advLMlJLL' liitWB!

with arcade graphics as i.i Mugsy —
the gangster g 3rru Melbourne Hjusc
is about to release — but meanwhile
ba.k in lhe company's secret basc ;
somewhere in the Anripcdes, a lean -
of programmers ars working or.
arcade and adventure blockbuster;
for rclfBsc later in ths year.

The company is keeping th: detail;
of its forthcoming action gan.es close
i.-.' lis chest hut loyal Australian
Philip Mitchell "I wouldn't have the
place for anything" who wore the
Hobbit gives seme clues to the
adventure plans. He is just putting
the finishing touches to Sherlock

Huluic:.

Allheugh it uses the same language
analyse: as the Elobbit, I'hi ip ias
made imptove:nerts so i: CM ukc
sentences like "I th.nk the vicar
killed Sir Heniv in the consevalorv

villi n bluwpip;," — very useful if
you happen to he a Victorian
detective. Philip also wan:s to
produce a "sausage machine" to take
the hard vork out of adventure
writing.

Shakespeare on silicon will test
your English revision to the limit

If yoi bei.ivf what Penguin says the
company"s new compuier-basec
Study Software is "the first truly
revolutionary breakthrough in the
study of li;eralurcsin;c the invention
of printing." Only time will judge
whether the Study Software revision
aids which £re aimed at undents
preparing for "O" levels and CSEj
prsve to be ronre significant ir
human history than the invention of
the hlackhoard or tecch :he mass of
die pupulmiiMi lu lead and wille ; bill

Pcn.guin hopes eventually to produce
Study Software for all subjects.

Renault's new s'ippery customer — the low drag Renault 25
boasts a 0.28 arag co-efficient — the lowest so-far of any
production car but inside ,t relics on a microorocccsor from the
6300 family and a ROM rull of syntnesised soeech to justify its
claim that the 25 makes "*he most extensive use of eiectrorics
yet te?t?/r In a tittgtt-sjatv piudjctiun van,"

The first set of Penguin progrtnis
deal with six cf the examiners
favourite Shakespeare plays,
iMscbclhj Romeo and Juliet, Julius
Caesai, Merchant of Venice,
Twelfth Night anJ the first pan of
Henry IV. You rannnt throw nvny
your books just yet though. The
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particular ther.iee and characiem in
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your way through to ihe h'nc
refcrcncc.

Whcic the Study Software beats
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is in its cross referencing. In
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any of seven miin characters plus the
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20 :hcncs. you can call u:> Macbeth
and match htm with themis like
Ambition, Loyalty and Treachery.

You can even cross reference
diflcicul thelites — l.ke blood and
water. Not suipris-ingiy the authors
are two secondary school teachers,
John iMahoncy and Stewart Martin.
They lave tried out the programs in
their own classes but they stress that
the Study Sofware is mainly aimed at
home revision.

Thar ii why thp tirlfi will h?
released first on the Spectrum at

£5.95 each this inor.th with the BEC
and blcrtron versions to tollow in
May.

Gccgraphy revision is tt\c
target ( or TSSL's map reading
program for the 48H Spectrum.
Ttie £8 program explains ard
then tests co-ordinates, grd
references, longitude ar.d
latitude, map scaling and map
key reading. Once you've
mastered map reading you
could always turr. to Jotn
Dawson's use of computers for

nap writing on page 93 oi this
issue.

YOUR COMPUTER, APRIL 1984 49

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50 \OU=t COMPUTER. APFIL 198^

I could

that

Tonolamatl is quite a simile
programming task for hone
computing, You can easily
code a program —
according to the f ow chart
— which wi:i fix a seected
Az:ec Name-day for a period
of 13 years. Nobody but the
Arec priests could tell that
in those tines: The sane
Name-day appeared namely
in different months,
sometimes even twice a
year. Now, your home
computer will solve this
Aztec Calendar problem.

Tonolamatl, or "bcok of
tne days" insiudeo 260
Name days which were :he
basis of the Aztec Ritual
Calendar. This Fitual
Calendar was expanded by
nine continues cycles in a
basic 2340 days caiendar
peiod, i.e. 6Vz /ears,

Tho 260 dtfforoit Namo
days were a combination of
a number bat ween 1 to 13
and one of 20 days —
13x20 = 260.

The following 20 days
formed an Aztes "month ':

(continued on page 53)

Starting out in home

computing? First Bytes

is for you. Just write to

Your Computer with any hardware or software

problems, no matter how small or simple.

Spectrum
UDGs

Till-. .VHIUTV "i> IrKNkrN and ukb ;.-t\ui

own graphics set is importu.it in so
nuny applications — arcade games.

ClKMk, ehvuliatft and Rlsshij UHllt

to mind. A iaijte proportion of
pr^rums in this magazine include
litem.

The 7tr program in the Homon>.
tape is "character gcrteTJtor", Tim
cxcelli-nt procran'. makes it iasy a:ic
fun to generate your awn characters

However, '.ht tevl slei, ennir.}:

nWre about UDGs, '.. a ir.ajor
hurdle The ZX handbook does noi
«jiv»! vnovgh help, Thi< article is
written to pivc more Kutp, Tru
article ;s desUned to be used at thi
key-board of the Spuctnim, cnterir.j;
tin program*, aid uxperi;nenir.ji
w:ih :-on:.

Tt

M

mtL- S

F^h* a

1

M « ♦ J

Hf.M

£-C • 1

■~Hr ! *****--

Tonolamatl Aztec calendard computation alognthm

I..'! vh suppose 'Kat the learner has
used 'he Horizons ' chiracier
generator ' :o design a fjui
interesting and potcitially usdul

ehaiUCttTE. i-'.r-.: of all, it is important

to understand that clearing 'he
program h> hTCik and New, and not
by iwit.'hini; urt", ihe .Krarbics sei is
retained by the memory.
Slppose :he symbol was st fired as

"Graphics AV. It cai he displaced by

mtetuig

PRlM-G'aphi:3]A"

it h- entering

PRINT ChRS 1*4
'."he second method is punieulariy
i.ilpgrtant. It is used in this one-liner
i.i punt '.ha eorapioiu graphics &ei:
1 FOR n=0 tD 2D: PRINT CHRS

(continued on page 53)

TT&z?/"^

YOUfl COMPUTER, APRL 1984 51

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62 YOUR COMPUTER, APtIL 19B4

I could

do
that

(continued from page 51)

w*ett ween

one two

\ ALLIGATOR 6 DEATH

2 WIND 7 DEER

3 HOUSE 8 RASBI7

4 LIZARD 9 WATER
3ERPENT 1C DOQ
Wsek Week
ttvee four

11 MONKEY 1£ BLZZARD

12 GRASS 17 EARTHQUAKE

13 RE=D H FLINT KNtFE
1<t JAGUAR 10 RAIN

15 EAGLE 2C FLOWER

By combining the number
oono3 and the day series.
you get "Cne-alllgatar" as
th* name of the first day; ol
the second, "Two-wind"; oi
the third, "~hree*house" —
until you reach the day
■'"hirteen-reed", The
following day Is called
"One-jaguar": tie next,
"Two-eagle", and ao on.

There were 18 Aztec
"months" IS x 20 = 360
days — plus o n e
anonymous week — 36C +

5 = £05 Clays — in a year.

if one was called Four-
monkey — 4-11 — his
Name-day tell in different
months than his friend's
who was called Three-
monkey. You need a
compjter program to find
out t^* Name-days. Good
.luck I

Nobody found February's
Pascal's Triangle problem
vey taxing From a large
numbar of entries the first
to be picked f-oro tl*e bag
ca"ne torn R. Nicol, 22
Hawks Park, Saitash,
Cornwall

10 CUB I PAf-P- -,t !NK i)i iwur
"Ent»r nunbvr rc-f lint* required

~,ci as

20 Din (Wtti DIK Btc>l .£T A<\
>»1« tlT t(i)-ll WW "I"

JO POft «•! TO e

« PI|»NT , FO* t"2 TO « t-BT f\
t«»)-p;tf+B<k-I> • NIIW Al>-.lli»
"11 NOT bi PRINT -1"

» FOR m»1 TO »i LET B<u>»*(Kl
I h£»T h

•0 N1KT a

(con'inved (rem oage 51)

(144 i n): NEXT n

B.'for: earning on, try using this
one-liner. Sic how ii worki by
looking up ode of the characters h
the Y.X. Guide, page ISC.

N'o* for the mxi siep. Lo.ik a the
[>' (symhrl Ml MM on page V? of this
guide Included herewith is an
opnnded dugram of (he synbol.
rtiih .he • l.n. uTua-Ij cuIljuil, ili=
|{ nary value of each row anc also the
decimal equivalent of the B nar.-
number.

The 1'! symbol may be enered
into the "Graphics P* ! loration in th:
Spectru :ii's memory using pro;ram
I . When ihe input "i" is called lor in
1 . ni' RO, thf number? May be entered
ei.her ir. decimal — e.g. 84 in th; 5ih
row — or binary — in this case as
-BIN' 01910100 ' -You nay even

mix bianry rews and dec ma rows in
the same llnure; bein; defintd.

Tlu Binary number telates qutt:
obviously to tie shape of thj
graphics ehaaetcr. To convert th:
Binary to decimal, add up the
column values of each binary "1". So
B nary 1 1 0101 U "dee ma)
(61+ l6-r4)-Decirml 8-1. Check the
figure for I'l, row !, until you are
quite certain thu: ycu bnvu (tr«sp«d
this.

There arc two th:ngs to note to
conncciio.i with program ], Firstly,
mi can r .-place line u bv irm line
9C POKE USR "P"+n,r '
Secondly, yot can use Rtsid tnd Data
10 Input the rows.

1'ror.rjm 2 shows how he graphics
lb' l'l un be entered into the
Oaplcis I* location by uiinij the
Etead/ljara fe»!iire.
Piogrim 1

10 REM "dQ'UjG' -

.HO CI !s- PRINT' prim - . "Bow"

40 FOPc = 1 TO a

50 PRINT AT3 + C.12;;

60 NEXTc

70 FOR n = TO 7

80 INPUT ' Next Row ":r

90 POKE USR CHRS 60 + n,r

100 PRINT AT 4 4 n,i6;'

110 NEXT n

^20 ^RINT: PRINT TAB 12;CHRS
80.CHRS 159

15C STOP
9990 SAVE "dofUDG" LINE 10

Piogram fa (!o alG lo o:ogiam ?;
10 REM"de<UDG'"
20 FOR m =0 TO 20
90 POKE USR CHRS (65 * m) + n.r
120 PRINT: PRINT TAB 12:CHRS

(65 -m). 31 IRS "(1 44i- mi
•30 INPUT "P-ess ENTER 10

continue ;Z5
iiO N=XTm

CO

ritociHc^ojH

■

M

BINARY
NUMBER

BIN O0C00e®0

BIN 00000000

BIN 000000 10

BIN 00111100

BIN 01010100

BXN 0001010O

BIN 00010100

BIN 00000000

DECIMAL.

2

60

84.

£0

20

Expanded diagram of Pt symbol.

BEGI

Program 2

10 REM dclLDG -

2CFOR n=0TO'

30 READ a

40 POKE UGn CI B3 SO -t n, a

50 NEXT r

60 PRINT -Graphics : ChRS 80; - '

glvoc UD.G. XHRS "SO
70 DA'A 0.0.2.60,84.10.20.0
80 STOP

So llr, emariojt n n.nuli: character
has been considered, ,\ compleie set
ma..- becmerec hy adctint; the lines of
projtram la to profjtua 1, or by using
progniM J, in which the 1-ata lines —
starting ,i; line 7l> — will yield the
graphics set I wrote for a few
Chetniury programs,

Prrgrsim 1

1C REM defJDG"
2CFCR rn=0TO20
3C FCR i = 0TO7
4C READ a

5C PCKE USR CHRS (6£ + m)+n,a
SCNEXTn
7CN£X*m

8C D*TA 24.36.35,36.24,0.0.3,2.4.
36.8.16,60 0.0.0,56.4,24,4 56,0.
O.C.O,0.0.24.3e.36.36,i'4,00.0.
24.36,8.1660,0.0.0.56 4.24.4.56.
0.0.0.32.3:,40.5C8
90 DATA 0.0.3.6C.3224.a&.24,0.0.
0. 16.32.56 36,2-1.0.0.0 60.i.8.8.
S.0,0.0.24.36.24.36.24 8,8.62.8
e.0,0.0.0.O60.0.U.U.U.t.,2t>.HJ.*t>.
16.16.-6,16.2a.56.3.8A8,8,6.o5
100 DATA OA2.2£5.0.255.64, J2,0,0
CO. 108. 146,108.0,3.0.29.32,120.
3228.0.0.e.10.18.34-, 66.231 .0.3.
23" .S8.12C.68.66.231. i).0.6.20.
20.34,62.0.0
110 CLS: PRINT TAB 3;"CHRS'"TA
B 11: "Sraanics": TAB 23:
UD.G ": 3RIMT
120 FOR &=0TO20
130 PRINT TAB 3 U4- 3 ;TAB15:
CHRS (65 -si TAB 25; CHRS
1144-0)
140 NEXT b
150 STOP

By this sugc,
wondered Jbout r.
set. hu.'h as iho»e
genera ed using
ehaucier ceneraur
this, dismantling
graphics set.

Program A

10R=M"UDGHst"

23 FOR -n =0 TO 20

30 PRINT CHRS (65+ m>: TAB 'I
<^R5 044 + m);

40 FOR i = TO 7

53 PRINT TAB 5 + 2'n;PEEK
tUSRCMRS (63 + m) -f),

63 NEXT n

73 PRINT

03 NIXT m

93 S~OF
9990 SAVE '•USGllsr LINE 10
proyravi 4. Prhtovt.
A » 24 36 36 36 24 C
B ' 24 36 6 16 60 C
C ' aS * 24 + SS C

vou

,1WV

hjve

adir.g

J g-

aphics

' vou

nu',

hive

the

Hcrizons

. Program

i J.ies

my

chemist rv

D

e

F
G
H

I

J •

K .

L -

M -

o
p ?=

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R <
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c
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a

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a
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23 'G
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*

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60

16

B

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24 4 56

40 60 8

24 36 24

4

e2

32

22
4

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16 16 16 16 28
E E E 8 56
255C 25564 32
C 1081461030
28 32 12032 28
5 10 18 34 66 2310
J.IUft 1P0FR Ffi W10
8 20 20 34 £2

The Dital problem is hew u save
jii J use ywir L'IXj set. Th s dcpcr.cis

on whether you have a 16Kor a 48K
Sped run. I thirk it is rather
vusteiul to use a ReadTJata snrictvre
to u-deiineu graphics >et each time,
and use I his ap notch.

Suppose you have a UDCj set in
you - memory. Vou may, for
example, have catered :im: rm
pragnux J, Newec it, and catered
progrorr I to dismant e it. New to

»-lu;i: iltt projiroui, witlx>ut swi'ching

ott

Next, ewer program 5 without
typing »:i line 9000. Run the
program, which displays t.ie
graphic! set, and then idd line 90C0.
Be sure to use ihe coirecl codes in
Hues 90110 »nd °9 a 5. l'hi progrrm
end .he fruchks set are Saved in iwo
sections by ;»ot.> ywo — and 3r.ter.
^"atch for the second "itari tape
ihen press any Iwy" message Tno

protsrani will a.ito-.tar. — again in
two sections — hy simply ;,oad"".

TLe Ijuesbe^veea )Oa:id »9« are
ircaitibk for any program you iike to
vrite. using the L'DCi set.
Praoraiv 5

1C REM ■•UD64B-

2C PRINT' User De"ine3
G'apnics

3C PRINT: PRINT- CHRS
Graphics U.O.G.": PRINT

40 FCfl n = O TO 20

5CPRINTTA3 3; 144 +-n:
TAB 15 CHRS (65 + n);
TAB 20. CHRS (1*4»n)

60 NEXT 1

70 STOP
E010GO TC 10

£990 SAVE UDG48" LINE 9000
£995 SAVE •UCG46" CODE
fifi.1RR.168

With graphic? set in :his me.-nory,
Run program *. without I ne 9000.
Now add li-.e 9000, aivl .he deiuu
jTtigam is ready to Save by Goto
WW.
9C00 LOAD UDG46 " CODE 65368

For I6K Spectrum, substitute

10 REM 'UDG16"
9000 LOAD UDG1«" CODE 326O0
9990 SAVE "UDG16" UNE9O0O
9995 SAVE •'U0G16" CODE
32C0J.1C0

YOUB CCMPUTER, APRL 1984

53

When there are better computer
games we will be writing them...

Imagine, the largest most successful software house in the world are dedicated in the
pursuit of excellence.

From our massive programming, graphic arts and music department in the heart of
Liverpool, the most creative and innovative games in the industry are conceived,
created and brought to fruition.

Mever before has so much talent been brought together under
one roof, to work in unison toward a common goal....
the ultimate in computer entertainment.

hagine Software Limited, 5 Sir Thomas Street, Lverpooi, Merseyside LI 6BW. %
Dealer Enquiries Contact Sharon O'Brien or 051-236 3100 (20 Hies)

If you have
anything of
interest to tell us
about your
computer club
why not contact
us on
01-661 3144.

Local
news

Stoke on Trent

The Mixed Bytes Computer
Ctjb meets at Dilhome
Recreation Centre, New
Road, Dithome lear Sloke-
ot -Trent Bverv othVr
Thursday between 7.30 snd
9 j.rr. All users are
wclccmc. Coll Mr A Cope on
0782396003.

Long Eaton

The ZX Spectrum Club in
Long Eaton, Nottingham, ie
a non-profit making
organisation dedicated to
lift; (jdtu and ryhub litatiur uf
Spectrum owners. For more
details contact ? Rley. 63
Kmgsley Crescent, Sawley,
Long Eaton, Nottingham
NG10 3DA.

Arun

Arun Microcomputer Club
gets together at W:ck
Amenity Centre,
Uttlerampton, West Sussex
on the first Monday of evsry
month at 8 p.m. and tie
third Sunday of every month
at 6 p.m. Contact P

Cherrrnai, 7 Telbot Rood,
Littlehsmpton, West Sussex
DN 1 7 78L. T etephone
OS064-7307.

Shrewsbury

Shrewsbury Micro Club
meets at Shrewsbury
Shiredaii once ever/ two
weeks. Contact Mr V Ives, 6
Bramley Close, Severn
Meadows, Shrewsbury.
Tolephons: 0743-55024.

Mid-Kent

The Mid-<ert Wicro Club

has freed itself from

asaoc ation with the T3S-80

and all compijternikR arc
now welcome at the
Maidstone Teachers' Cem.re,
Giitingbojrne Road,
Maidstone between 7 and
1C.3C one Friday a month.
Ccntact W K Getes at 66
Buckland Road, Maidstone,
Kent.

COMPUTER

Paul Bnnd visits Gu Iriford to find $ «L

Paul Bond visits Guildford to find
out what computers offer in the
way of aids to the handicapped.

A M-w vi-'si t- me. Siokc ! run,
Stoke Read. CiitikUbrd may haw
thrown ii lev. members hut nevenht-
l«s there wis o eood turnout vhen
Yiinr Computer visited the West
Surrev Compute- club receitlv. The
evening was dedicated to micros in
the s*rvi:e of the disabled as club
chairman Fred Ticke explaincc.

Tone Isjcs from the Foundttion
fm Cunimmicairoti lor ihe Disabled
started ilv evening ofFby denonstra-
t n « a p p 1 1 c s t i o n s for t h :
Microwrkcr. This is ; handheld

kn-hc.ird with liquid crvxto ditplay

and SK oiboird CMOS RA.vi uhich
w.i\ originally d.-signed sone years
jio *-. a kinj: of hi|ih-tc--h notebook
nn specifically aimed as the
disabled,

1 he A'.icrownter uses a live-key
svsten to gencra:e text; you have to
learn difTcrcnt ccmbnai.ons to
gcnerite dtlTtTen characters. This, i.
of obvious u>e u> iomjoni' whoac
hiiwlwfiting is getting spidery and
shaky js in the vase of" a multiple
scleixsis sufferer. But versions hnv>»

been developed ivlu;h di> not even
require r.inds. Air Isle* demon-
strated a Mkrovntti controlled b»

bieathpov,er. IJghK in place nt
buttons on the keyboard indicate
what no.ioral buttons are bein*
pressed; when yoa release the mouth-
piece, the letter cones up on rh;
LCD.

This means children with d's-
ability can It irtegrated in normal

• chont*. tx-i'ui se ta«v huv; u nu-n r- of

writirs* Hat the" can cirrv around
with ihem and which is :ndcpcndeni
of i lie mu ns supply, unlike ne hulk 1 '
elect r.c typewriters th;t ihev arc
often foiled in uie.

An interesting applicaion of
computerised voice synthesis which
benefits hlmd peuple was also
demoistrued

They ran pla\ ihctt Microwritcn

inrn :i win* *vivh*»uwr' jyhich i.mh
cither spell, or tead out what they
have <evid tn Enure developments
srclude bigger program dictionaries
si- thai the machine will be ab.c to
pronounce wird? hk." "Wednesday"
as we do, rather than sepiratuij; each
syllable.

Peter Bell pu' the emphasis or.
education. He leaches at the Lord
.S'.ayof 1 'elmr College, a school fb'
hmdi:apped in Alton. Hampshire.
While many .if this 250 pupils make
use ofi MkrovriteTS, they doi't solve
everything. Some youngster* »ri- no:
highly-motivated enough to learn the
cedes Another system used is the

;V.H A|i|il.- CJlllJ-UlCI Jll Apple

with special software which alpws
you to us; i he whole keyboard, par'
ol it, or ;lsc cue liution a> a seaming

dei ice

One child viih speech disability
mi- fV^rrii.Mieinis coiimi emhle
JilTi. nliv in .vriniu' a trie til
typewriting migh he his en/ire
uuipui ib; i he day, leaving him
exhaused Communication with the
cxttsidc world wai a rea pioblem.
I Mitg the AtacAppIc, togethei with a
loynict, instead tiiliii expanded key
board connected :o a [ypewiiter by
failure prone solenoid! and w:rcs, he
generated m nuch levt en his I'rst
day ol" use thai he hid io K- held
dovn: lie vos so excited

Some time ago, the scho.il was
invnhcJ in a jtudi luihui lik; l">>ur
i 'o.uputcr\ 'Dtsu'ii ; iVltcio"
competition ukii for their

purposes, they derided, would b: a
pottabfe battery-powered, CMOS-
has.-d computer vith LCD display
and buili-i'i ininter, Coitxidtnioily,
Epson brought out the Epson HX 20
tust as th;y Inched, and it vae
pre ty much w.iat :hey wanted. This
enab'xs pupils to communicate and

in iak* notes it clasaci.

Jahn Piper, from Toils for Living,
j \C\-lsh hased uigarnsation contact-
Jblc on ni J7«1472. painted out that
we're all one-fingered typists at
heart. He showed an crgonomically-
desicned k<-\ hoard designed io

Abcve: demonsi.oUog a MiCtO-
wnter adapted inr hieath
control Left the B8C Visi
speech setup for dea; speech
tdusBtion.

icdece die muiiuei of lepemive
moves, ittil by PCD Alaltron Ltd.
IVpirii with one linter s all very
■vl-L but however last vau Jo it,
heir. 1 .* ahle rii generate cue void with
one mocement is ;till much "aster.
Olive Socitir's Spectrum came in
uy some prais.- with its keyboard
sySleOl — -Jul you still need tvo
(tatters in opera e n A similar device
In: people with cetiit: unicaiion
proldoir.i ha? heen dcveloiscd hv (jiiy

riamilTcn, a doe i or from Woking.

I a;> is a hij- 2ft by >fi pressure
pad board vkh oTOIuno Ueyivorjs
■vruen on n. The Splinfc, as it is
known, can be hooted :o a V1 11' via
HI infra ed ink like a remote control
l"V tin: . This «h'. ate) caoles iying
around ia an eniiroantcni whore
ihere ate probably enough people
tuh nxbili y problem! an.'wuc.

\ir Ptpe' ulf.o detnmv.rriVed n
system tmp.oying tie BBC Micro to
teach deal" people how to modulate
the sou id 'hat comes oui of their
thnxils, Because deaf who lave been
drat fr<m ">irth cannot rear what
t!ie^ are saying, their speech miy
;ourd nrarce ro non-handicapped
people.

The KBC can be used as a source
of feedback. I'sing a t.9)0 Visispecch
inteiiaot, an oieillosenpe tanern i«
jCencrated en ihe screen by vocal
inpuis. The deal' person can ih;n try
;n achieve itie same pjlle.u undei-
neatli that cievted by the teacher.

lie Vi'est Surrey ("ompner Club,
\eho;e secretary. Cms Karriey, cm
be cootacledonGuiidfcrd 6812! Est
%S7, has many such inlbrmativc
.■. .:i:r..Ci l.n.d u;

YOUR COMPUTER. APR L 1384 55

Wrih he TOE range of games now available lor
home corr.puers each holds a difersnt challenge. Now
Ihere are three Competition-Pro Joysticks iri the Kempstcn
range that will come to your aid anc improve your
plaving capabilities Your movements will booomo
quicker, with singer poised over the lire button at 'he
ready, "/our scores will be out of this world. Playing will be
so raucn easier! I! ycu're serious cboul the thcillwny w yuui
computer presents then you shouldn't be withoul a
Kerapston Competition-Prc Joystick.

H^ cafck

p»o 1000

nrgcmomically designed hanOlw and bus*? » 8-wuy
arcade quality leal switches for precision control * 5 frjot
able to alow mere comfortable playing positions *
Rubber return tor smooth control * Rubber prolwuk.i puds
on base * Base fire bar for left or right hend control *

rxv

PRO 3000

All the winning features of the Pro 10C0 plus
tcp lire button '.or precision sne hended
play * trigger fire button (or true arcade
realism »

PRO 5000

Again all the winning Stature; oi the Pro 1 000
but incorporating trjo crafemanshtp plus large
1 Vf ontio! knob for cornf olable play » Unique Ciperec
shaft :or maximum senativry « Dual independent (ire
buttons * Nylon covered sleel shar. lormcxirr.um robustnest.

KEMPSTON JOYSTICK INTERFACE FOR THE
ZX SPECTRUM

Allows the use of any Alari'Comnodore type iovs'ick wi?h
the popular ZX Spectrum computer. With well over 1 00 games
on the Spectrum row compatible with the jcystick this is a must
lor any Spectrum Dwner who wants the power of a joystick
added to the power of the Spectrum. Simply plugs into the
edge cennector at the back of IheSpedrum. No modifications

Some games you can bu/ were produced before
Joysticks were available tor Ire ZX Spectrum. Wllh the axJ of
Kempslon conversion tapes these gemes can now be
played wrhanyol
thekenpston
range of
joysticks.

H

TR^nE Mosl torn are available irom W H Smith, 3©ots.

ENQUIRIES Spectrum Computer Centres and good
WELCOME computing snaps or direct from:

HempiTon

■^■MirDr\"ci tr^rorsKtirc i-rn

MICRO" ELECTRONICS LTD

Unit 30 Snywr Way. Wobum Roaa mausffial Estate.

Kempston, Eediord MK42 7AF. Tel: (0234) 856633 Telex: 826078 KE fvPMt G

Star*
chart

Dambusters

BBC B:

Bcmb it dov/n:
£795:
Aliigata:

• • • • Plus 5
raspberries 'or lack oi
information on availability
of diss version or
possibility of swapping
Great fun and rather
unoredictabie vsrson of
W.W.I Damfaus:crs
exploits, Ralhol simular
graphics to defender
(planetoid) but yuud aiiU

simple. Also good sound
with external speakers.

Vortex

BEC B:

Shoot- 'enu?:

£7.95:

Software Invasinn-

• • •

Th s 3D in 20 game (no red
and green glasses) has ai
inevitabil ty about t that
makes ycu try harder sven
though you know that
failure looms! Unusually I
fmnrl that both the
joystick and keyboard ga/e
good contro of the fighter
craft equ pped with laser
torpecoes.

Pengwyn

BEC B and Electron (see

note):

Never y:

£6.95:

PnstRrn :

ir if PIjs 5 raspberries
for lack of information on
availability ct d:sc version
or possitilit/ oi swapping.
Moving blocks of ice,
cashing nasties and tryiig
to align special blocks
leaves me chilly.

Hicksted

Spectrum ASK:
Games for Girts ':
C5.95:
CCS:

• •

Hirkstnd. is a gsme of
computer sed hcrsemanshp
based on the differently
Spelt ohow jumping ground

Hickstead. It is one of -hree
games under the somewhat
dubious category of Games
for Girls' thought it best f I
goi a little hase mad,
computer crazed friend of
mine t3 review h. She was
to out it mild y riisaopo nted.
Conclusion: a grsat idea
executed poorly.

SOFT

Snowman

WSpectrum 48K

m£6.95

MQuick$Hvs

• • •

THfiRS'S NO PEOPLE like snow
people, and rhe Snowman, hascd on
iht book '>y Funjus the Bogeyman
ercaioj Reymand Briggs. is. already
no.scd abroad as unique among
Lompulcj ^iiuiub fiii iis ufll-viuleiLe.
At last a came ih.u parents can buy
for Junior secure in the knowledge
thrt they will not awake next
morning to fitid their lovable
offspring trans-formcd intc a
blcodcrazed witching freak.

Instead of dying in rhe Snowman,
yon K^ito <lccp Tie serpen HkpUy is

a frosty slw, ladders and levels
display. Yoti have to collect six
nieces of silOv in ordvr la build the
snowman. Watch out lor roving gas
flames — these melt t tic sr.ow you arc
carrying, end it reappears eHewherc
on the screen. Th.s game wil appeal
to perverse people who insist on
celebrating Christmas in the middle
of ihc summe-j since yon gain e<tra
points far collecting various
Christmas .rackets, presents,
stnrkirigs ;nd tree>. If you eolice: an
ice lol y \ou can ward ofT she gas
flames. Your energy is replenished

X

by eating a turkey or Christ mas
pudding.

Ir. srages iwo and three you have ro
kit oui :he snowman with scarf, hat.
noe« etc while molding the Skcp
Monsters. These can ie neutralised

s age yo.i try to collcc: icecubes :o
sop your snowman from melting.

Thecal flames mah iheii COerttbttCk

here Attractive graphi:s, well
thought-aut idee, perhaps a little too
rnucb dexterity rtquirtJ tc position
vour mai ai the bouorr of ladders

BLUE THUNDER

..: „ RE 875 BIS SIC

Blue Thunder

MSpectrum 48K

MC6.9S

MRichard Wilcox SoHware

• * •

NOTHING TO DO with the ti.m
starting Rcy Scheider, or the TV
scries caning James Faientno; in
•his prcgram we are a world away
mm the difficulties cf comnuivty
policing tv ficlkoptcr. Yoj ire

probably better oil' playing this game
with a joystick, than the keyboard,
but even then tht lire button is ?iven
the three furctiens of 90, ISO degree
turns and firing. This can complica*c
(cont'nu&d on page 59)

YOUR COMPUTER. APRll 19R4 S7

SOUND BOOSTER

FOR SPECTRUM

• Plug ir and use No intenal connections

• No batteries needed

• Good clear somd

• Output confol

• Load/Save facility bu It-in

• Fully guaranieed

BRING THE SOUND OF
YOUR GAMES TO EXCITING
LIFE FOR JUST

£14.99

(Including VAT + P&P)

r

NEWSFLASH!

14" MICROVITEC
IITOR

iMPATIBLE
CARRIAGE

16K RAMPACK FOR ZX81
£17.50 (INCL. VAT & P/P)

3 COLOUR MONITOR

1 SPECTRUM COMPATI

\ £285 (INCL VAT & CARF

Please send me (enter quantity in box)
JSourd Boosters @ £14.99

IColour Monitors (Spectrum

Compatible) £285.00

EHRampacks for ZX81 @ £1 7.50
Above prices include VAT/P/P/Carriage

NAME

ADDRESS

I enclose cheque/P.O. for £

ZEAL MARKETING LTD

VANGUARD TRADING FSTATE, 5TORFORTH LANE

CHESTEFFIELD. DCnBYDIIIRC S40 111

Telephone: 0246) 208555

BBC COMPUTERS

West Wales

BBC model B £399.03

ELECTRON £199.00

Microvitec Colour Monitors £247.03

Disc Drives.. "rom around £189.00

Teletext Adaptor £225.00

Wordwise (Wordprocesson £46

Graphics ROM 33 Disc-Doctor £33

Plus a range of Accessories & Peripherals etc exceeding
that of any other Micro, inc uding Printers, Papsr,
Ribbons, VDU's, Z80 Second Processors, ROIV Boards,
Joysticks, Light Pens, Dust covers etc etc etc.

2'1 hr despatch on all stocked kerne

Schcol/College Crders Accepted . . . Immediate Supply
Discounts on Educational So-tware

A_L OUR PRICES INCLLDE VAT at 15%, Securicor
Carriage extra.

We are official dealers, and stock probably the largest
range of COMPUTER SOFTWARE & BOOKS for the
B8C Micro in West Wales, plus a good selection for
several other popular computers. !Over 300 software,
and 55 book titles FOR THE BBC MICRO ALONE.)

FOR FURTHUR OETA LS. CALL IN FOR A

DEMONSTRAT ON, OR SEND A SELF ADDRESSED,

STAMPED, LARGE ENVELOPE FOR PRICE LIST etc.

(We cannot rsply wit how one)

(Wc urge /ou tc phone FIRST if coming ory distance.
Note our shop hours}.

CARDIGAN ELECTRONICS

Chancery Lane, CARDIGAN, (Near Wooiworth's)
TEL: 0239 614483 . . . Hours MON-SAT 10am-5pm

COSED *LL DAY EVERY WEDNESDAY land Pubic Holldsysl

BETA BASIC

ENHANCED BASIC FOR THE

ZX SPECTRUM 16/48K

26 NEW KEYWORDS - 10 NEW

FUNCTIONS - MANY EXTRA FEATURES

ALTtt *■-■*.-[ utfiWi* i-v-riri.. j# *m- -.i m-<> bMMN '<*

AU7C J.t BjlciT-jUiDt-YV Ife* ij-ntp-l

CLOOt tantmii • rt^ui j-wk ***■> a'^'n «nd u«im - -i *i*J G05UI

fli:J.1y

OCICC — , hUfcrl -.' ■-- ,

OO - DO .OOP H'wcnr* >*ntn MHU |Mft| -r.-3i-.-i.

DFC*I - COUCtoPCKE

EDIT - lijwii'iwilnrarw

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SCROLL - m ROt,. fed wflhoit wraifounl

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CcnvE*rfiior»b*t^**n decimal jnd rswBrlecinial - cenverrioo bBtwjen Negsrs wid
two-c^oracler aliings (allows 'intcgof affBva*") - fotmanlng ?f numbtfa -
INCTflNr. and CTTnfNC 5 ^ju,,rtio.::. diiwunt ul Ti3« iir—^u'v ~ OoUtM« PEEK —
cutctiI lime.
F&ituros ffirtittir-

Sioflld'^ntry keyrtorde (in caohi^s nn>ocie) with wntw ch^ck on enffv - kuwati
n«w eror mossiflas - comp*tibilry with Spocrum SASC — prooram occjpiei
\\jiX 5 6K cursor can move in al directions m n lim hong edited — flashkiig
cu'rent Ime poin:ef - BI^:AK gets you out of even npchine code lock-ups - PlOT
lets yoj plot string aiywherc on the screen - FLOT end OR* W scale and >ffs«r
vauescen be s«t us^g XRij. YKU Xlib ard YOb - 1BK nnd 4fl< veiaion? on
sa-ne tjpe - cempreneniive manual.

Only mXJOincfusivfff

Pk«s« send me .....copies o' Beti BASrC .

I enclose cheque t'c.o. lor €

Namfl: „

A&l<e*k. , , ..*. ..- ,., . t

' .-..*- «..«4 , .,..

betasOft

92 Oxford Road, Mosetay. BIRMINGHAM B13 9SG

58 YOLR COM'UTFR. APRIt '934

Star*
chart

Starship Escape

Vtc-20 with 16K expansion:
A/We shuot-'en-up:
Sjmlock:
£7.95:

• •

A tractor beam drags von
aboard tie alien ship. Yout
cratt is dismembered ana
yon nust piowl about trie
erne ;rau teassemolit g your
own vessel. Ardrcids,
robots, space spidsrs and
the ei/erwatch ng Force
Ctoud make life difficult.
Playable with joystick or
keyboard. You zoom around

the space hulk at greet
speed, infunaimgly being re-
iiiipiiiun-d /vllttlt* yuci
started from with /our
trusty K9 trend. Graphics
not marvellous, ot Louise.

Destroyer

Unexoanded Vic 20:
Shoo*. -'em up:
Sumljck:
/v.95:

• ••

An unerroellishsd shoot
'en up, lequinry pleev.y cf
cc-ordination, nr>v<irrn»l«ss
Using the keys you have to
stser your destioyar back
ord fort* - on the oggm,
shooting to eft and right at
attacking aucraft,
depinchertjing submarines,
and doocing torpedoes aid
bembs. The whole game
runs for a time period shewn
by a changing strip at the
bcttom of the screen. If you
survive the lime period, a
bonus basec on planes
downsd ie added to your
score Not bad n 2K.

Bull Run

16/48K Specirutn.
Run away
Pfripps Associates:
£6.95:

■k

Silicon Pamplona. On
holiday in a Spanish village
you ae puisuec by a wile
bull. Iheie is a 30,000
pesetas reward tron v/hich
50 is decucted svery
second. You use yourself as

hait aid put up fences.
These do not stay up very
long. The Bell will yore ycu
if you ore carrying s fent-c.
but you are "airly safe
behind one. Three levels of
play, not great graphics,
cheaper than a holiday in
Spain.

SOFT

(coivmund from pagv 57)
uuiiciv I .id. also duhiujs about <h.-

Lidlill 01 lilUcdlHe pUsi-pe.Uv;
giaptncs

This is a perry Ihophftrr viuh i
nuclear "factor thiowi in, First,
pilot your whirlv.-iud Ott the
V.'STOL CAiricr ovei ;H<. islands,

getting shut at. Thane ire live
different levels of difficulty. It the

Umh.c. levels vou contend vvi h waw.
ot |ci lighleis and indeslruc shit led

UuUuuua, Oulj one oi the latter it a
tine - the number never gels as
hi^li .is W vou penetrate enemy
lints, cesitoy the aucleai sem.«ni iml
rescue up io Iti . uuuadcs iu jiic

"i'.ie on-screen note line dispuys
-ioio left longn. leservc etcoprets.
cut rem score aid mission number. A
••tit ljI bar on the lighi i>l the screen
indicates yuui chopper's iiicl level. A

i hjllem.il tg jlJltle.

Neptune's
Daughters

■ Commodore C3M-64
U £7.95

■ English Software

• •

As iHt-ouj pre-decimaTttauon tokes
gees "My girlfriend'* a mei uaid
lonely vittl statistics: 36,24 and bur
and mx a pound." Your history
teacher in liiit be able to explain it to
vou. The aim ot' this game is to
rescue Neptune's beautiful daughter
Irnm ihp spa terpen who iv holding
her captive. Unfortunately vc have
to adn.it this same had us pretty well
Stamped, i'. is cither i vciy
demanding and challenging game, oi
impossible to plav and consequently
stupid, depending or. who you talk
to.

Zither Aay, Neptune's daughter
never showed up for any ol us. arcl it
is i Io' ol bonet rigiuiii); octopuses,
sucker plants and deadly amoehaf
)um fci ,i blind date Vou take the

par ol U acuauian venu absorb;
oxygen through hit gills You have to
ii[;i i otTthe attentions of pouorum*.
octopodes anc deal ih: way ol
deadly sueker ;>!aits to get through
to successive caverns in this
-Mitmujitic Scuu.DJe M.ei.uiiu. ii'.i
eventual!; encDuntei amoeba
swarms, vou iiu\t to aKiuuew •<>
youisell uuo : puicic. whe,e »>n
can kill i ban with youi hai po mi .ti.d
absorb the bubble: ol '0xv4e.11 which
they emit as ilwy die

I his is as fa.' as iimi of us umld
v^el. Acpaicml" at ; er this a n ousici
ciab is enCCuntJrec You kill tnis and
iak« it wJ:h you lo feci i.ie sea
serpent All being weil, the iorjied
opbiut huu ogre wi.l kr,oekotVfor40
winks whik you depart with ihe girl
in die vet-took oulftl. You thett had
bet back ic ilu safety 01 tht, jala.e,
where rpejuhttbly you .an settle
dowr. t.i discuss the expr.cnoe over
half a shandv and a packet at' shrimp-
flavoured cusp*.

ibis is ell heai:a_\, however: one

llin f. up ; ati -,<y ihii hjlMk. hii. a

vcr; high frustralioit u/ioccnt

Fred

M48K Spectrum

ME6.95

WQuscks'wa

if • • •

|-ko*i mi people who brought you
KugjooK ot Houga-buo, cepending
it> whicn computet you play it on,
UOiuet biioihei :easi oi Disneyesquc
graphics.

Ihe scietn display presents you
vith a vertical maze of glowing blue
..'....i... ujiti, jiottiJ v. 11. h the

intrepid Ftcd wends h.s weary wry
11 search ol" the treasures of the
l'li.ii.mlii. Yesj '. kiuw vvc have done
rhe Pharaohs at the botton of yoar
^aiden joke.

trtd ihiiK up and clown ropts,
avoiding contact with rats, acid
crops, ghost which can go th'Ough
walls, chameleons, mummies and
vampires. He has a gua and six
hilkis.

Thcieaiesix sciccns, increasing in
cifficulty, iVIIuued by :he option to
racurn i« lh« lii.t scr«un, o redefine
lie maze and numbei ci mongers.

YOUR COMPUTED APRIL 1984 B9

7 Tandy TRS-80: Setting The Standard

WithDot Matrix Printers

9 Vz" Dot-Matrix

£ 399

With Colour Computer and
Parallel Interfaces

DMP-120. This versatile tfVfe" dot-matrix printer has high speed data
processing and graphics nodes that makes light work of many many tasks. It
prints ten and 1 6.7 characters per inch, or elongated f veand 8.3 characters
per inch at up to 1 25 cha-acters per second. A very corrpact printer it usee
fanlold, single sheet orrol paper and has built in parallel and colour computer
compatible serial interlaces. 26-1255

Colour Graphics

£ 149

• Uses Easily Replaceable Ink
Cartridges

CGP-115, Ultia-conipai;l iuIlui graphics jrintar helps yoj c r eale beautiful
graphics in red, green, slue and Dlack, and it prhts alphaiumerics. Built-in
ccmnands make it easy! Text mede prints 40 or 80 characters per line at 12
characters per second. Uses easily replaceable ink cartridges. A selectbn of
eclour pens is available. Set rreasures 2 15 'ie x £ 1 /4 x SVs". 26- 1 192

Low Cost Dot-Matrix

£7995

• Print Graphics
and Alphanumerics

• Whisper Quiet I

TP-10 Thermal Printer. Perfect for use with the MC-10 Colour
Microcomputer, and our other colour computers. You can print both screer
graphics anc alphanumeric*. Textmode prints 32 characters per line at 3C
characters per second on 4V3" wide thermal aaper. Special repeat function to
make graphics programming easier. Colour computer-compatiDle serial
interface only (630 baud). 26-1261

..Or Choose The Daisy Wheel Printer
That Best Suits Your Need s.

"Letter "Letter

Perfect" Quality"

£ 1199 £ 599

With Free
Bi-Directjonal
Tractor Feed

(26-1459)

DWP-410. ideal for SCRIPSIT™ word processing select ten or 12
characters per inch, or proportional pit;h. Forwa r d and reverse paper
feed and Vz ine feed, underline and programmable backspace.
Includes V120' space and 1 /4e" line feed. Automatic paper sei makes
paper insertion easy. Uses interchangeabls print wheels for type
selection. EPW mode for SDecial wheels. 26-1250

• With
Automatic
Wheel
Positioning

DWP-2 10. A low-cost printer tor mat "professional look"! select ten or
1 2 characters per inch, or aroporional pitch. Prints over 200 wo'ds per
minute (18 characters pe' second) at ten characters per irch. Easily
handles an origina plus two copies, features V200" space and 1 /4e
line feed, ribbon end, ccver open and paper empty sensing. With
carbon ribbon and Courier 1 C print wheel. 26-1 257

NEWS
oaeo

rssu

tt t t
h h

The crystal ball

Giving the crystal orb a
good shake reveals two
new adventures from
Software Pro.ects of
Liverpool. The fi - st, Legion,
is for the BBC B and takes
place at the time of the
Roman Empire. McKensie
is the seconc and has you
playing the role of a
famous spare* mplorer who
has been captured and
imprisoned 01 a pirated
cpaoc station. You will need
a 46K Spectrum to play It.

Lothlorien, perhass
betler known for Its war
gaming programs, has
launched a series called
adventure Mester. The first
in the series is an Arabian
Nights tyce fantasy
entitled The Stolen Lamp.
It is a text and graphics
adventure for BBC B
owrers.

Another text and full
pictorial adventure for the
BBC B and Commodore 64
micos is Twin Kingdom
Alley, a large and compie>
adventure from Bug-Byte.

A helping hand

Calling all fans of Level 9
Computing's Colossal
Adventjre. Are you baffled
by a certain bridge-
blocking Troi ? See below
for a clue that w II enable
you to pass Iree of charge.

Attention all Scott
Adams Pirate Adventurers.
Could be you are stuck at
the second treasure. Help
13 at hand below. As usuai,
the oluco arc written
backwards to avoid the
eyes of the urtwanting
unwary. Let us hear from
you about other problems
you are having — I will do
ny best tc help in tiese
pages.
Troll trouble:

RETALMEHTEVEIRTER
OTDROWCIGAM YAS:
LLORT OT SGGE NEDLOG
EVIG
Pirate treasure:

GID NEHT 33
EC*P,DLEIF EHT Nl
Happy lunting!

Our man with the
brass lamp and
the key to a
thousand
mysteries sheds
light on new
adventure
orog rams. Lost?
Never fear, Hugo
North is here.

Kingdom
of Hamil

■ 38CB

■ £9.35

■ Acornsoft

Kingdom of Haaiil is the latest

[Mi7'lf r rn j.iin :he llustrious band of
Acornsoft adventures for Lie BBC B
Micro. This group now includes

;u( h brain bafflers as Philosopher':)

Quest, Sphinx Adventure, Castle of
Riddles and Ccunt down to Doom —
enough m.nd -bending puzzles to
.tecp yoi occupied for ihe rest of this
year.

Like the other Acornsoft
id ventures, Kingdom of Hamil is
text only, eommanls bcine input in
he normal verb and noun format.
Each location .$ describee in detail
on your visit but thereafter in brief —

unless you specifically request the
full description with he command
Look.

Some of (lie commands icco*nised
by the program ar: detaibd on the
cass-'te box; it is up to >ou to fhd cut
the rest while play.ng.

You always wondered why you had
"slue blood in your veins when all
your frisnd* had common or garden
red. Now you hav± lmrncd why —
you were stolen from your royal
parents, the rulers of Hamil, as a
child. Ii ia up to you :o prove ycur
identity and claim your birthright,

but watch out — you seem to have
made an awful lot of enemies when
y 3u were a baby.

'I'li: adventure starts With you
trapped inside a chapel. Venture
outside and t 16 ton weight drops on
your head, ending your assault on
the thror.e before it has begun.

Some adventure* have plenty of
locations bu: precious little in the
way of objects, clangers and puzzles.
Kingdom of Hamil has them all, in
spades.

Heroes of
Karn

■ C3M-64

■ C7.O0

■ Interceptor Micros

HpRflRS OF Karn is a Commodore
64 adventure of the classic mode but
in modem dress. Net only does this
text-based fantasy give yuu xu
attractively crawn coloured picture

X2* r * Xo **• •*** o* * ruiMd co««9«-
r£S2 country l.ti to tK« «*st *tut south.
* •»•**• *« «« archwav to -**»• uost.

of each location, it also provides
some very impressive music into the
btugaiu. As you might expect In a
classic adventure, there's quite a bit
of treasure needing '.0 be collected
but that ii not the main purpose of
your mission.

Lone, bng ago, a hcrdc of felt
creatures swept down upon the Land
of Karri, and great was the slaughter.
Few neaped the carnage but among
the handful that did wete four
Heroes of Karn; Bcrcn, lord of the

birds of the air and swcriiman
supreme; Istar the Wise, master of
magic and lore; Haldir, gteatest of all
minstrels; and Khad.m ihe Dwarf,
small in stature, mighty in renown.
Yet, eventually and one by one,
they were taken captive, bound with
stone, iron and mag c. Where and
what they now are is unknown but
legend his it t.iat one day the
stranger will come, will venture forth
into the dark Lands, will fight with

the powers of night, will find and
release the long-imprisoned heroes.

That day his da.wr.ed — you are
that stranger. Can you fulfil your
destiny?

If you can, I guarantee you will not
do it quickly. There are ever 65
Icoations to seek out and explore, and
over 30 puzzle; to solve. Much of the
advent are is linear — that is, some
prtihlems can only be solved by
overcoming earlier ones. This makes
it a shade tougher thin some others
and should give your mental powers
a real workout

Heroes of Kam is a first-rate
adventure providing 1 great deal of
pleasure, the musical passages ate a
delight — turn up your volume for
the best effects.

YOUR COMPUTER, APRIL 1984 61

\

The Commodore 64 is compact arid nippy
like many other home computers.

The Commodore 64 has an enormous
memory: it's a positively elephantine 64K.

If you're unsure as to why you should
want a home computer with such a big
memory; we'll tell you.

It means you can use moie exciting and
advanced software.

This means you'll get greater enjoyment

out of your home computer because you can do
so much more with it.

You can create high resolution graphics,
or reproduce the sounds of many different
musical instruments.

You can broaden youi horizons with the
library of educational programs. You can teach
yourself programming, or you can entertain

V3U:WS:l 'HI XVMOC'Wi f*At 'MOM SEL :; Wui A'.j WKOACf H&VON !Mi M VKUQS BW.NI ■«< O- BOOTS. RMBEIOWS. WM SMI H AjKtS.CLMWS GFKNS )R3T.M£VZIt&VIAffi ■ : l r» •.".St •'<:>" UM I -'Ml

Rut its memory...
well, that's a little different.

yourself with countless games.

As well as hundreds of software programs,
for use both at home and in the office, there's
also every peripheral you're ever likely to need.

Tumingyou r 64 into a super sophisticated
computer system with a printer, plotter, disk
drive and monitor is simple.

Little wonder the Commodore 64 is seen

to be the premier home computer, especially
with a price tag of only £229, or less.

Makes die name worth remembering,
don't you think?

Cz commodore

fen wont inkjbvw ijn cuvwc the (aMP.'r)::HF i»»Frn».wnnN ctN'flt hjs aiw miua sioiqi. ejiksiwe s.i «G

MHN UVMS.VWK) WORTH RtDIFR.SIOfv COCF, BSiTISH hBMF. STOFtS ASOA. »PPDl SAWCENTRE. HOUSE Of CL'MSBAIE. iWSS A*U HIM R MOD FETAH.-BS.XLSO AT BRANCHES Of A NATION*. NnwOK Df COMMO DOFE CQMF"UIIH UULtRS

REVIEW

After the first false dawn, Kathleen Peel finds out if real
keys can heip Hadofin succeed where Mattel failed.

Continuing thf. recent fashion of

repackaging an existing .ow-price computer
by fitting it with a proper keyboard, :he
Acuaiiur, II succeeds the ill futcd \quarius.
At £80 it bccorr.es the cheapest real-keyboard
compute! currently in production.

The misgivings regarding the original
Aquarius, apart from the keyboard, were in
the limited rtiKclution of rhe colour display,
poor Basic, virtually n;jn-existen: editing
facilities, high price of peripherals and very
limned saftware. Combined, these led to a
general panning of the computer.

The revamped Aquarius compote; with the
•Spectrum, Tandy M.C-I0 and Las^r — the
Laser may not now be on sate due to ihe
demise of Computers for All — and fi Is the
gap left by the discontinuation of production
of the Oric I and the real keyboard
computers, the Vic-20 and the TI-994A.

The review model is a preproduction
version of the Aquarius II and there may be
some minor detail changes to the finished
product. As the staiiduid cT the review model
is very high with a clean PCB withcut

Ftyure 2. Diaw mecrc commands.

Ok
i rsi

IB
?0

■30

■50

^ S

Qi

I

S= bm53> 50130Li2Sr^0d25"
kiS = Rri-20,~i5 _i U= R5 C5 -

R|^|.C>ri-j:8,-6(iH l5--15m+15, 15

•4'

3PY

En

F>gure 3. Aquarius printer character se j,

«*•*-•'. 4 " '111-*- 1 Ki'V>ir 1 T(ifliJft'i« . %•"— i

**fc'i >»-.- ,/Bt23436'39i ■. ■ , NtPBCDEPGH UK
etlNU-'UKSHjLKXYZr^I ~_*abcdefsn i I < ><»Wt«>a
kuwiv;! '. mm »*_.: ■ •_»+• ••*■'♦*_» «■■■ «i i ■ ><

-♦■ tt/Hih'-'^J i>*\»*Hr» .'.RsMCAn

Figure 4. An indication o f Ihs p<xel
rfisoljricn available on the Aquarius II.

Figure 5 The Aquarius Menu command
fcrmut and screen dtsofay.

_!ST
JO CLS

ts«n.<cc« ,: ' wx so T oiea» ;na .aoe • <?ee

I

O LOCfiT£i,.l!STOP
p-r

Ci'-Cle

box

changes, I presume any changes will be in
ROM ind cosmetic.

The new keyboard makes a :renendous
diffcrcr.ee to the Aquuiiun. Alihuugli not
elegantly styled, it is very good. As I like
computers ro have oou keyword and fully
typed entries, the Aquarius gets a definite
plus here. My only criticism of the keyboard
is that ioir.c users like an audio feedback and
die computer does nit provide th.s facility.

The Aquarius comes in a Basic 4K. which
leaves 1,61:2 bytes free lor your programs —
not much but a I6K RAM pack at £30 and
S2K RAM paste are available.

More memcry or a gsmes cartr.dge can be
pluegcc into the expansion slot. Further
expansion is via a mini expander which ades
two joysticks, a cartridge and a memory port

and co3t3 £40.

The Aquarius II :an use the pcriphrra!s
designed for the first Aquarius, f.nd the
manufacturer of :hese micros states :hat the
Aquarius III, dut for release in the autumn,
und the Aquariu3 IV underdevelopment, will
also be fully compatible w th all peripherals
and software.

The primer interface .s RS-232C, hur dots
rot allow for two-way ccrnpntcr traffic; a pity
realty as ii would have been useful 10 be able
t:> network the Aquarius. Because the
i iteifac: is RS-232, it should be possibe to
use any other printer providing it is capable of
runrint) at 1,200 baud.

The c.isplay was qvitc reasonable with little
dot crawl, but surprisingly for i computer
from the Far East, there is no video output.

A res:! key is provided next to the on/olf
switch. T.iis allows a warm start when

followed by Control Slid C.

The Aquarius II is identical in operation \y
tic original Aquarius with the Extended
Microsoft Ba>ic cartridge. This provides
several improvements, the nos- significant cf
vhich is the itiiplr.mtnt.tioa of an editor.

The editor lias some very nice searc.i
facilities, but also some rather annoying
anomalies although in use I soon became
accustomec to the fact that once you have
gone p*st a position in j line you cannot go
hack to ecil .urther, you must restart th;
line.

The ability to search a line lor the nth
occurrence of a characte- was impressive and
would have been even more so if the uiulii-
s.atemem lines were not limited to 72
charact its.

The editor commands are:

I insert

X go to ?nd of-line

L list rest cf line and restatt
nD delete n characters, default 1

H delete to end ol line
nC change n characters

E sa\.e changes

Q ignore changes (qut)

A abort ourren.cranges
nS char — search lor nth occurrence
nK char — dsle'.e r chars in line

The tape interface worked withou: many

problems a/id is adequate fix speed. A
purpose-built tape rcrarrler is available with
huilc-in record and playback l:vcb suitable for
the Aquarius. Em using a three- oj five-way
DIN with 3.5mm. plu*s the Aquarius can be
used with any cassette recorder.

The 4K RAM is used to store the d, splay,
co.our attributes and i few system variables:

the user is left win 1,652 bytes for a
program.

The ROM is inaccessible in normal usage.
This will prevent the .nore adventurous user
from exploring the inside of the Aquaiius
and csn only lead tc a delay in the provision of
quality, independent, low-cost tape software.

The Microsoft Basic is faster than 'the
Spectrum, timing tests are given in figure 1 .

64 YOUR COMPUTER. ^PFIL 198*

MBf 1303)

?6rl58i r

>=>9

IC ft+l)THENQOSUB30

000
_ A )-A
K XlB
3SUS23^ =RII

FQRA=1T
I-FBC Al>

NEXTA

£s$$j henqoto7

step

FOR=»»1TO100
PRINTBC R-1 i

NFxre

RETJRN
3i BEA)=BtA+ll

35 RETJRN

ii

13
20

v>

25

30

j Figure J. -AoiiAWfj.i t'ming

As is usual in computers of this pries, the
Basic lacks good structure and o.ily supports
On Gosub and On Goto.

The Runic is noi Kpsice-ccnsitive and tid.es
up messy input nicely and tr;ati upper- aid
lower-east the same. Unfortunately, erior
messages are of he two-le:tcr variety and tre
not always that helpful to the uninitiated.

Program li.ies are eompres-.tcd in menory.
The soeed test program usei 227 byics in
pngrarn storage, ar.d Spectrum used 339 for
the same program., thus the small memory is
worth about 2.2K in Spcrirun terms. Note
that as a consequence M" the pat.-kagir.jj,
numerical accuracy is not so good.

The Aquarius Extended Microsoft Basic
can us: the Def FN command to define user-

specified functions. These act as sma',1
programs within the Basic program arid when
given an argument will produce a numeric
answer. SQR. ,s a built-in Dcf'and given the
argument 49 would produce the answer 7.

Line and Circle commands are available
which can be extended to cover colour, til
and boxing using additional parameters.
Interestingly there is u :,ub sis of the AtSX
Draw .Macro commands. Fig.ire 2 gives a
screen dump of an example from :he manud
showing th; macro commands in u;e, drawing
a little house.

The Aquarius II hao t screen r*solaticn cf

£0 ty 72 using the teletext -type three-by-twn

graphics blocks — figure 4. The Aquarius

(continued en page 67)

YOUR COMPUTER, APRIL 1 934 65

COMMODORE i

Aaif CDCrrai iu

Author: Anton Hlnxman

Hive-cave action*
BorHe Bea n&ods help
defending the hive Fight off
the invading swarns, bathe
the bees and defend your
Queen!

FLEA) RAYMOND BHKiCS

48K SPECTRUM

Author tndescomp
ttcny action f

Jjmp your way out of the
caves with Bugsboc the flea
but beware of me fearsome
Dragon as you jump around
the exotiz vegetation.

} "fy ft II ' J -Ti M + tW'tFmWm

Atthor: Davie Shea

An enchanting game based
around episodes of Paymoni
Bn'ggs ' amazingly successful
bcoK.

48K SPECTRUM

Author: Sandy White

Battle the Ants in the soft
solid 2D dty cf Antesche r .

Authors: M. Preston,

P. Hunt, R. Rose, 0. Moore.

A mythical graphic
advent jre ,'n the dark and
deadly halls ofEarthsione
Castla. Battle Dragons.
Vampires. Sphinx, Zombies,
Skeletons. Gryphons and
other leoendarv beasts to
rescue the beautifjl Princess
Paula.

48Ki

■MM
AuthOi

SPECTRUM

<r, hdescomp
Action beneath the
Pyramids!

Feaness Fred the Irtrepid
Archaeologist searches the
creepy catacombs below the
torrid tomb of 'Tootiscarmoori
tor the terrible trsasures
amidst monstrous mummies.
Ghastly ghosts, sats ana rutst

48K SPECTRUM
COMMODOPE64

VIC 20 + 3K cr OK Ft AM
DRAGOK
BBC MODEL

Ajthcr: John Holls
Authors: Mark & Richard Moore

Authors: Stove Leo/Chartec
: IS C Andiew/incentive
Auttor: Dave Mendes

All titles available from Qutcksltva Mull Order
P.O. Box 6, Wmborne Dorset BA21 7PY.

uicksilva programs arm available from: Boots, W.H. Smiths, J. HHnztts, Mtcrodeafei,

HMV, Hamlays. Jain Lewis, Computers tor All and all npuubfe

specialist computer stockists.

'%

(continued Uorr page 65)

Claim of a 320 by 192 graphics resolution
simply means that 320 is the number of pixels
across th; saee.i and that there tre 192 down.
T:iey art not individually addressable.

The colour resolution is equivalent to 4C by
'tb or 8C by 24 depending upon which way
you wish to use the teletext graphics.

Two other useful commands arc Get and
Put. These sprite-like commands copy to and
write from i specified array, producing high-
speed an.marion — it is quicker than Peek and
Poke.

Menu is a command I have not seen before.
It permits a selection of items to be placed on
the s:reen and the cursor used to make a
choice from the menu — figure t. This looked
to be mere than just s nrvehy.

There was very little documentation
regarding the scund capabilities of the
Aquarius II. It appeared to be a single channel
operating ihrough the television speaker. The
games cartridges supplied with t.ie review
model showed the sound to tc superior to the
Spectrum,

It can be seen from th^ screen copies that
ilic circle command does not produce round
circles. This can dc corrected by using the
aspect parameter of the circl; command.

A r.ew variation of he popular four-colour
printer plotter is to be launched with this
ccmpuier. The printer has all the normal
piinting and plotting facilities cf the
originallv released Tandy mocci and costs
£120.

■The differences are:
■There ia no Centronics interface.
■The whole of the Aquarius charac:er set

is built into :he printer.
■The printer can procuce single colour
screen dumps using the Copy
command.
■The transmission rate a: 1.200 bauc is
twice the spsec of the Tandy.

T mnrngf'il rn hnnk rhe printer up rn n
Spectrum through the Interface I without
difficulty. The graphic characters are
obviously different but Lsin=; the full-colour
screen dump programs I have produced in the
Microdrive arrirles, this should not Iw a
problem.

This screen dunp jives an a^r.taste
representation of f?e aspect ratio of
circlet diawy using the Circle

commands.

There appears to be i bug in ihc Aquarius
Cony command which sometimes giv.-s un
offset :>f half a :haracier out of position on
mixed graphics «nd text use.

The accuracy of the reproduction is very
mnrh better than that of the Aquarius
Thsnral Printer at £9S.

General control of the cokur printer is

by:

■Text: .Print; LList the on y way to use the

plotting facilities.
■Mixec: LHmt; LList graphic characters

available but fewer control codes.
■Graphics; Copy fc screen dumps.

The technical specification for the printer
is:

RS-232C w fh Data and CTS
Eight bit character
Cne start tit
One stop bit
No parity
\ 200 baud

"The provisional documentation appears to
be very detailed with a number of useful
esarrples tc get the ueer scartec.

Because the review model A'aj- a
prep.oduction version of th: Aquarius it did
not ittve any documentation specific to it.
Neither th; computer or the printer are
completely n«w pioducts and therefore
documentation should bt geod.

CONCLUSIONS

^The concept cr compatibility
through the Aquarius range is
gocd and probably worth a
premium, "he software, com-
pantively speaking, is limited in
both volLme, quality aid is also
expensive, but is available. I think
the peripherals could be mo'e
aggressively priced and every
ettcrt must be made to ensu'e
users are not rest'icted in
accessing information on the
technical aspects of the
Aquarius.

■At tbu, a ganes machine well
worth considering and a vast
improvement over the Aquarius
1.

git is expected that disc drives will
be available in April or May but at
present tiere is no indication of
price. ■

YOUR COMPUTEF. AfniL 1034 67

CBM-64 SOFTWARE

WE WELCOME qui new president. Our
country of Ananaba should prosper under
your supreme excellency's care. With sucn
celutions of grandeur we commer.ee this
survey nf nunc ol the recent games sottware
which tus become available fur the
Commodore C!RM-i>4, the computer ynsi
automa:ically associate with elephants.

Banana Drama proves conclusively that .t
ain't what you do, it s the way that you do i:i
Part of a baich of what might loosely be
termed "simulations'' from Visions Software
Factory, the program puis yon shaking into
the shoes ofjuan Rodrigues LVII. This tinpot
dictator hes to remain in power by skilliul
manipulation of public opinion and careful
financial management.

Graphics are limited

Graphics art limited to colour presentations
cf statu; reports, financial analyses, ar.d news-
fljishrs Ymir supreme rxcplljncy it some-
times, for example, asked by the industrialists
13 make crude union activities illegal. 11 you
co, you will enhance your popularity with the
creadec State Security Organisation. Ananaba
obviously sorted mil any proKlcns witn its

equivalent ofGCHQ Cheltenham years ago.

Once you liave decided whether or nol lo
infringe people's democratic rights, the
program presenti you with a number of
rptions. You am please foreign powers,
pacify a sector, assist a sector, raise stale
funds, do nothing or lti.>k after number one.
You on buy i private submarine, fcr
example. You can a!so improve your status.
hut rhi* is almost as expensive a; hiring an
advertising agency as some governments have
been known to do.

Uusher is also Irom Visions. Your c.iance to
wear a 10-gal.nn hat and Ml in front o" the
computer prirnirp and saying "Hav? a nire
day. y'fcll; ^eicha later". This Dallas scenario
has you drilling tor oil, transporting it by
road, or build. ng pipelines. You can export it

Paul Bond flees with
fleas and races in
space.

by tanker or supertanker, but there is no
Straits of Hnrmti?. Savard

A good map display shows your read laiuer
crcwling to its destination, or your ship
coming ;n. There are random veil-based
disasters, pipelines valve fai.ureSj and wage
demands from ship's personnel. The aim is to
be the first out of two to four players to earn
on.* million dollars from the exporting of oil.
Until then all your revenue is pouncs. Maybe
there's something to those Ne.v Forest oil
denos.rs after all.

Insects are ai traced to the Commodore 64
fin some reason, alihough the or.ly real bug I
found wts in Sum.ock's Jumpm Jack which
gave an out-ol -memory error.

Creepy-crswlies abound in Quicksilva's
Boogaboo — a close relative of Bugaboo for
the Spectrum. That program was writ en by
Faco md l J sco anc a whole host ot Spanish
types. Pedro Re.iz lakes a bit of :he credit for
the 64 x'ersbn, alcng with Felix Arrahas —
music — and J L Doninguez — production.

Sting 64, another exercise in eorrpuierivcd
entomology from Quicksdva, was less
attrac:ive. The ides, is good, but the graphics
are rsrher clumsy. Screen (hie purs you in
joystick control of i hee-swam — a large black
blob. Ycu use this to bounce other blob-
swams which ire irytng to take over your
hives. Screen Two pu:s you in defence of an

individual live; sun) fly ;i stp adron of siripry

stingers ntc the encroaching hordes, When
your bees are all dead you can swoop bach, to
the hive and pick uo another lot ant.l the hive
is taken over. The final scene leaves you
defendirg a raiher -epilsve look ng
organism, from attacking drones.

t-'rom bees to anK Hideous Bill and ihe Gi-
gams, a gripping ;hree-part tale ot h;ro:sm

scn«r

and romance, is one of Virgin Games' more
premising efforts. Bill — we are assured that
:he nickname Hideous was bestowed upon
him by his father out cf simple but accurate
malice — must save Greta, he light of his life,
"ron becoming ant food.

Ynn prnpel Bill around a Puc-Manesque
ma2e crushing ant-eggs, pursued by the
aggrieved parents. Grab a speir ind you cat
kill the so:dier ants, but only :br a set period
of time. The pink ant seems particularly
nasty, but Yonr Computer would not wish :o
be tccuscc of singling out pink monsteis for
critical attention. Any reference to the
peculiar aggressiveness of these creatues is
based solely on detached observation. You
havr heen warned.

You get no weapons

On the second screen you get ro weapons;
you run around the maze, squashing baby
insects, presumably infant;. To trap the Gi-
ganis you pick up a lever, insert it in a
mecharism and use it to oper ard close the
doors m the maze-centre, /reity convobied,
huh? There is a tir. of baked beans in the
centre: you need ths to get through the thiid
level, where ynu runnel down Through under-
ground workings, while the eggs are hatching,
10 Iree Greta. Then you get a surprise. This
game is definitely value foi money.

Spiders »lsn get a lon< in, in ftihblr Rns's
Widow's Revenge. Arachnophobes beware.
This is nne of those sccnarious where
mterne:ine violence in the back garden has
escalated lo a previously unacceptable level.
Using a laser base, mobile within the bottom
third of :he screen, you must neutralise
various ants and spiders. There is an
impressive bird winch whoops when you hit it
and shoots up the semen. It is Cemipede with-
out rhe centipede. Fast and firious aid ■jnie
addictive.

The depths of space are beckoning as they
do about this time, I>ji first I thought I'd have
a quick game of table football before zooming
off tup thr Irnrly cosmos Of course Bubble
3us's Kick-off doesn't compare with the
Chromisonics 3D football game, neither is
there an option for grabbing one side of the

Left Bugaboo from Quichsilva.
Below: Mega^awk from Big C.

rat

06 LIVES

HI6H <li

63 YTJUF COMPUTER. APRIL 1984

tabic and making sure the ball rolls down the
opposite end.

Righ:, here we go. Zooming down the fear-
some space tunnel, rhc "irst of Hagor.'s many
sophisticated defence systems, every fibre of
my being is filled with dread. The Hajon Ueet
has been alerted and wa»'e sfW wave of astro-
fighicr*. comes bun ing at m;, The fate of
entire galaxy et cetera rests on tht success of
my mission. You know how it is. Quasar from
Voyager is actually rither gone; you fly down
a vulloy with mountains: on either side. Above
you Stars twinkle in the airless reaches ct" the
voic. The approaching craft cast shadows*
giving a realistic 3D effect. Voir craft can
bans aid swerve to avoid them. W.ien you
have knocted ou: these — the more skilfully
you knock them out :he faster you progress to
the next level — you a~e confronted by
bouncing "obots. These don't cast shacows,
Having dispensed with the springy
cybernauts you are flying throjgh Kp-iue with
asteroids, space mines and Fltror rockets as
they flash towards you. Next yoc face scene
one again, but with indestructible deteoce
poles added — you have to fly around these.

Mcgihawk from Big G isatartlingly similar,
except that the corridor sequence has a roof en
.[, and thai both y>u and the approaching
diens have flapping whgs. Refinements
.nclucte a gauge showing how much longer
/ou have to survive in each sector. My vox
gOCS lo the kangaroc dinosaurs that r-udden y
appear hopping across :he planetary plain in
■.his program.

Hopping is one way of travelling in

Anirog's Moon -Buggy. Piloting your balloon-

wheeled personnel carriei acroys the stark

^^^^ lunar landscape, rockst mnrrm hHp yon

.1056 spring across chasms and a ray-gun dis-

. integrates the grrjke-like orange blobs sitting

■i around wi:h a singular disregard for the hig.v

I way code. Apait from the gelatinous jay-

I walkers, you- joy-ride is impeded by the

I activities of what looks suspiciously like a

3 helicopter drepping bombs on you. Of course,

I everyone knows that it's impossible to have

I helicopters on our moon; and hkewise tins

i =jamc is practically impossible to play. Any

"^v. 1 lunar motorist who lives longer than 25

\ seconds is a veteran.

Anirog Skrarrble p.tches yo.i into the
familiar red landscape, dotted with MSti-
aircraft missives anc fuel dumps whirl' ywi

.Above: Super Skramble front Terminal
Software. Right: Skrzmtle iron Anirog,

have to bomb to keep yojrself flying. I'h.s i<
fcllowed by a blue landscape leading hm the
traditional tunnel with its irritating whizzers.
You can shoot these hut ,n the next zone you
arc confronted by indestructible firebals over
a blown landscape: it is a competent
implcmentaiiori ar.d quite good fun to play

Terminal's Super Skramble is a little more
daunin^. There is a distinct fuel consump-
tion problem. You really do have to wreak
havoc in every sir.gle fuel depot or you just
won' - . Sliy off the ground long enough to rntcr

the cavern.

In l^SS's Neoelyps you arc the good guy,
freedom fighter and renowned star pilot. The
bad guys, an alien race from a distant solar
system have invat-ed Neoelyps, one of your
colonial planets.

Destroy the radar towers

Tile attn of tne game is to destroy the alien
rcdar towers and shoor down rrc defence
craft, Ycu s:art offwih 12 ship; and lose one
etch time you crash inirv an aliers, a tadat
tower or the planet itself. Every tine you
down ore of the bad guys, you get an energy
shield which means you can mow rhrnngh
stdid obiecu — you can dive down tnrough
the city structures anc into the planet's
surface itself.

Stellar Dodger frcm Terminal Software
plunges us into another nthe.--wnrd y SfMlwio
unlikely to encourage tcurism. As ar. inter-
stellar shuttle pilo: ycu provide the vi.a! link
between your starcruiser mcthership uid the
planetary sjpply dumps. In the way is a
rrp.ache.rous ast»nvd h?lr Th«* screen display
shows tie carrier, from which you detach
your spherical tender. It even has little
flashing lights around its equator — by
pressing the Are button on tht joystick.
Dodge che rocks and land on one of the ilnvc
blastpads at the bottom of the screen.

The game can b: played with the keyboard
as well a* with joystick: b.tt I don't ."eel myself
quite in accord with the effusive blarb on the
packaging. Superb hi-res flicker-fnv sprite
graphics? Superb, they ain't. Just plain
ordinary. Full colour? Maybe, but the things
on the screen arc so small they lcok mostly
white. Great sound effects? I should jolly well
hope so.

Company

Game

Price

Visions Software

Gusher

E3.QS

Factory

Banana Drana

£9.96

1 Felgate Mews

Sludland St

London W6 9JT

QuicksHva

Sting 64

£7.95

Palmerston Park

Boogatoo

£7.95

House

IS Pamcston

Hd

Southampton

SOI 1LL

Virgin Games

Hideous Bill and

£7.95

61-63 Por.obello

the Gi-gants

Rd

London V7113DD

Bjbb'e Bus

Kick-off

£5.96

87 High St

Widow's

£6.99

Tonbridge

Revenge

Kent TNS1RK

Anirog Software

Moon Buggy

£7.95

BHIgi S1

Skrembe

Hurley

Surrey

Terminal

Super S<ranble

E7.7E

Software

Stellar Doger

E7.7E

2E Church L«ne,

Prestwich.

Manchester.

PSS

Neo;lyps

E7.95

452 Sloney

Cosmic Split

£7.95

Stanlon Road

Coventry

B'gC
Bircmosa Hall

Haverton
Nantwich
Cheshire

Viyager

The Eushess

Centre
Claughton Road
Birkenhead
L41 6=S

Megan awk

Quasar

£5.95

£5.99

voun crjMPUTrn, *,rr,iL ioo* eg

DRAGON survey

From a quiet day fishing
on the riverbank to zoom-
ing through hostile space
zones, Paul Bond discovers
the Dragon has it all.

If THERE is or.e thin? the Dragon hts been
blessed with in abundance by the software
companies, it is adventure games, Anothei
popular theme, for some reason, appears to be
Kong-style games. So if you arc into swords
and sorcery, dungeons and dragons, and z
certain amount of running up and dowr.
ladders evading the wrath of apes/droids/:cky
things, then the Dragon has it all.

Monsters from Softek Software is a prime
example of the latter genre. Your spacecraft
lands on the surface of Zol II, which as luck
would have it is a veritable Swiss cheese of
ladders and platfcrrm patrolled by bellicose
monster-robots. You have to find a pewer
module in each mine and return it to your
ship before your air supply runs out and you
succumb to anoxia.

Ort-3crccn this gripping scenario is reduced
to the usual grid of vertical ladders and
horizontal platforms depicicd from a side-
v;ew in the traditiona. autumnal Dragon
colours of green, brown and yellow. The
ladders arc always yellow. It is tempting to
conclude that the Dragon's home
environment of bosky hillsides, verdant
valleys and fertile sylvan gltdej has exercised
some stiange atavistic influence on the Welsh
micro's colour-set. The result may be restful,
but when looking at a batch of Dragon
software one is left w.th a craving for a splash
of colour, perhaps the torrid crimson of the
heraldic dragon ofCymru iself.

If you succeed in your task by dexterous usj
of the cursor keys to move the Shift keys to
dig, you can penetrate further into the alien
Below: Skramble 'ron Microdeal.

SOFTWARE

■

*»■«**.

delvings and encountet monster-robots who
have actually found out how to climb ladders
and give you quite a hard time. The computer
games fall into certain generic types is
undeniable. This is a competent imple-
mentation of the digghg-holes-for-monsters-
:o-fall-through type.

Bonka .s smother variation on the same
theme. This scenario from J Morrison Mirims
thrusts a man wearing a how.er hai and
carrying a spice-hammer hi among a bunch of
homicidal, highly-charged Blue Meames.
Th.s is closer to the arcade tncestor, except
tha: the Mcanies dc not wave their antennae
about, bu: the idea is to lure them into holes
dug with the trusty space hammer and bonk
them on the head.

The worst example

There are four different ladder layouts, four
selectable speeds and option of one to nine
Mcanies to start with. More points tre added
for the more levels the Meanie falls — the idea
is \:y and dig holes from the top level down tn
the bottom. Of" course your oxygen supply is
rur.nir.g cut. This would get my vote, if only
for the fact thai the Meanics ate blue. The
ladders remam stolidly yellow.

Fireball, from Abacus Software, is the worst
example of the Kong tendency. You cannot
even get the man up the ladders. The
company, who should no: be confused w:th
Abacus Frograms, arc hard :o contact, so I
could not deduce if this bug was solely due ro
incomplete com mental ion. Why it is called
Fireball is a complex mystery. You arc on the
bottom level being assailed by half-sentient

purple jellies. Apparently if you hit the
fire-button this will help you .n and out of
lifts. Sadly there arc no lifts in .his particular
program

There arc, of course, shoot-' em-ups for the
Dragon, but most of the ones tested for this
review remained relatively restful.
Microdcal's Skramble sticks close to the
standard Scramble format, although you
probably would never have guessed this from
the ingeniously original r.ame. You zoom over
mountains, bombing fuel dumps, braving
anti-aircraft fire and mooting down missiles.

Dragcnhawk from Microded presents us
with an unedifying scenario of larvae and flies
littering the screen. You have to shoo: all the
flies bul avoid hitting the larvae because they
turn into birds. The Nuffield biology course
riallv his r lr»i of things to answer for.

The problem with the birds is that they
hamper your movement somewhat by
blowing up every time you bump into them,
and they tend to spend a lot of time lying
around on the ground. You are supposed to be
saving the unfortunate Fred from beint;
collared ty a Dragonhawk which flaps
ponderously scrcss the top of the screen,
hiding behind a brown shield. You ctn shoot
the bird, p-nviderl you do not trip over one of
the Fiss.le avkns duM-bathing to the base of
the screen, but you really only get two
opportunities to do it. If you shoot it after
Fred has been seized in its claws then you
have to catch him in a tray, of course. The
whole thing has the perverse logic of dream
except of course that dreams usually htve a
higher resolution and are much moie
Colourful.

Being rhe adventurer you are and having
survived all the prev.ous adventures you have
attempted, you still went out and bought
Microdeal's Ultimate Adventure 4. This is,
we are assured, an advcn:urc game with a
difference. You are obviously over qualified
(or any more expeditions of the dungeons,
haunted houses, spa:e trek type. So here we
have a game which is totally new, that is, it
has all the elements ;ust mentioned thrown m
together.

You begin with £250 in the market place.
You have :o buy gear ranging from spacesuhs
:o shovels to assist you in your quest. Yum
goa. is to accumulate £1,000. Common
problems ate encountered: each move
diminishes your initial 250 strength units.
Most :s lost in encounters. Your survival
depends on using the right item for :he right
fight, but you can only carry up to eight
objects, including treasure. There are seven
treasures to be collect.

70 YDUF COMPUTER. APRL 1 984

***ta^

' • " '

The difference here is the ponholes which
link the various parts of the zdventure
together. You can be wandering down a dune
and suddenly get sapped into a jungle, or
somewhere e/en mere outlandish.

A fishing rod might have been of some use
to me in ray travels — however I iad plenty of
opportunity to build up that resource which
the "compleat" angler requires more than any
other. Patience. The screen display for
Shards' Hooked depicts a brother of the
angler sitting hunched on the riverbank
clutching a telescopic rod guaranteed to nuke
Izaak Walton green with envy. As no man is
born an artist, so no man is born an angler, as
the great ilslienuaii used lu say; this
simulation did nothing to convert me, but I
would hazard that it replicates faithfully the
boredom of ihe actual pastime with none of
the disadvantages of contracting arthr.tis or
kil.ine swans by poisoning then with kail
weigh;?.

This is the sort of game that might come in
useful for people recuperating from the effecs
of prolonged space combat such as we
experience in Avenger, by Voyager Software.
This has a rather peculiar load.ng protocol,
no; w;ll explained in the documentation — I

had to mess about a bit to get the machine
code in. Screen 1 presents you with a number
of gieen objects — munition's stores — which
you have to land on without bumping into the
c range cross-shaped mires.

Each landing gains vuu 10 shots in the
second stage of the game where you are
catapulted headlong into an advancing swarm
of actually rather inoffensive a'.iens, They do
not shoot at you. You, however can butcher
theni mercilessly — if it moves blast ,t as
they say "en the more bloodcrazcd blurbs.

Company

Softek

12/15 Henrietta
Street, Londan
WC2 8LH

Voyager Software
Business Centre

Claughto i Riud

Birkenhead,

Morseyside

L41 6ES

Program Price
Monste-s £6.95

Aveiger £5.99

Above leU: 3or,kd ftoiii J. Moitiwi Micros.
Above: Avenger from /oyager Software.
Left: Hooked from Shards.

Each hit scores five points. If you get as far as
the third screen, you have to try and attain the
top of it in the time allowed.

You have a fly through a couple of asteroid
belts however and if you hang around too long
waiting for a gap a missile will be launched
these missiles never miss. Each level iuis its
own high score table.

Illusions of speed

Devil Assault, another Microdcal game, this
lime by well-known software cowboy Tjiii
Mix, shows the kind of illusion of speed that
can be generated on the D32. As in :he
previous game you can select the colour of rhe
background you wish to play on. There 3resix
skill levels. These determine ihe starting level
and the type of missile fired.

At the beginning of each screen the alien
antagonists materialise by having their
component parts appetr to rush together fram
each side of the screen, accompanied by an
impressive whooshing sound.

Vampire bats fly back and forth across the
first screen, while the lowest one tracks you
and tries to bomb you a la Galaxiar.s. Should
you manage lo hit one of these creatures they
split in two — if it is or.e of the loweimost pair
the rest of the flock come swooping down at
your laser tase. At higher .evels, the devil
himself appears running atorss the top of the
screen and dropping a flaming cauldron
which severely hampeis your movement. And
th:s is not all — presently you have to put up
with crazed robots on the second screen, end
last but definitely not least, the belligerent
sproir.gs — purple blobs which bounce about
trying to stomp on your base.

J Morrison Micros
2 Glensdale St
Loods LS9 9JJ.

Bonk a

£7.95

Microdeal
41 Truro Rd
St Austell
Cornwall
PL25 5..E

Skramble

Ultimate
Adventure 4

Draconhav\k

£8. CO

COMPUTER, APRIL 1 984 71

DESIGN YOUR OWN
MICRO

•

VC'AKV tfpChve .\inclni-, .nd C.nrtmnHnrr and
Acorn too. So far Aphrodite, Da Vinci,
Invincible, Mardarin and the rest have just
been project :odz names in tie Your
Computer vaults. Now we can reveal the plans
r»u' rwnWs hnv«- for pitting bet:er micros at
their fingertips — and there arc more would-
be computer designers out there thar. you.evcr
imagined

Ideas ranged from a go-anywhere pcrtable
wiih a hnilr-in ntHin telephone to a tatt;r-day
Nascnm hotby computet. Entiics came in
from ill over t.ic world including an IBM
lookal.ke from Angola and a Bang & Olufsen
hi-fi style design from Denmark.

Some readers put in moie work than ethers.
While half a dozen people scr.t in sketches on
the backs of envelopes other covered pages of
graph paper With circuit diagrams and Teter
Au-Ycung sent in an 8,000 word tyred
snhmKnirn outlining his idea*.

.'he overwhelming majority of the entrants
lock the competition very seriously — except,
that is for Matthew Mty ot Dublin. His
Perfect Micro would have a robot arm for
typing in program*, not to mention robotic
legs, an acoustic Modem to give you access to
"everything from Ccefax to Nato" and a list
ot .anguages inc.uding Basic, Pascal, Fcrtran,
Rude, Assembler.. French, Logo, Pogo, Pretty
Basic, Very Basi:, Forth, Second. Noddy, and
Big Ears.

A surprising number of the entries in all
categcrie; weie improvements on the
Spectrum. Tnc most popular idea was to give
it a proper typewriter keyboard, with function
keys hetlcr sound, cartridge and joystick
interfaces and a built-in cassette recorder to
tidy up loading, Vol could tell thst the
dreaded £X-81 RAMnack wobble problem
had burnt its way indelibly into eome of the

Everyone wants to be a
computer designer
now, as the
flood of entries
for our January
Design Your Own
Micro competition
shows. Meirion
Jones reports on
the ideas that
appealed lo our
independent team of
experts. Next month
— what the computer
companies think.

cesignjrs' minds. Th;y had drawn
agricultural-looking bolt on peripherals which
would not have come adrift in a nuclear wsr
let zlonc if scmeone jogged the table when
you were programming.

Sinckir't QL was atmoancud before the
competition dosed — in time tc affect some of
the late: entries. One design was jast a rough
sketch of a QL in the attache rese, sawn off ct
the end of the keyboard so that the twin
Microdfives coulc be fitted ;n by b:inj; turned
through 90° and fitted above the keyboard
rext to a flat screen TV.

Like Apple's Macintosh, also announced i.i
January, the QL has one of the 6i>000 family
of processors &t its core 30 it was no surprise
Mat the last lew mailbags of designs were fu.l
of 58000-based machines. Overall most
rsaders went for the 8-bit central processors
t.iey know and love — 6502s if they were
Corrmodoie, Ori: or Acom users, Z-80s if
they had a Sinclair and 6809s if they had a
Dragon or Tandy.

The supposed benefits of compatibility with
t.ie IBM PC drove some io adnpt 8035s and
8086s and there was a sprinkling of Z-8000*

1 28 C RAM . J?K ROM..W5W8 liYtat»l,cnm\Kt port.

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micro except 3 ■
spacebar TV. .\

phone, v^deo fA

recorder and
computer in one M

pcrtacte unit Sj

Aphrodite, abpy.e, and
Ds Vinci, right use more

rntione!
technology.

and an 80186s.

Bui:t-in light pens and joysticks seem
popular although most designs included a
provision lor ihj joystick to be detached from
the keyboard when necessary. Alexander
Martin, whese (ketch carried the dcleful note

"Protuct design graduts — 10b needed"
included a detachable trackball in his plan.

While most ot the light pens where
intended for drawing on screen or selecting
from a menu Matthew May's consisted of a
light bulb on the end of a wire "for
programming ir. the dark", Richard Htimans
gave ihe credit to his mtm for suggesting a
remote control joystick and several designs

ussd infra red or ultrasonic beams to

communicate between peripherals.

Most of the bauery-powcrec micros
su^gestec included some sort of Cat screen
display on the keyboard ever if il was only a
sir.glc-linir liquid ixysial display. One cheap

and easily practicable .dea w.iich occuired to
both joh.i Niven cud Patrick Lawton was a
little watch-style LCD showing haw much
free memory is left in the computer Jt ;.ny
time.
3y incorporatinp a battery — as Andrew

lAA* 7 " 1 '

""--

v OUR CDMPUTiR. APRIL 198*

Petsr Au-/eung s
8.000 word

sjbntssion.

below, soon
became V.nov as

■The Booh".

Rice suggested you could make ii a real time
zlock too. This could oe used to date stamp
files as yuu ueated them, A warning :aiiel
flasning up messages aich as OH —
overheating — was yet another proposed use
for an LCD.

Mosi of the competitors wanted between 16
and 12SK of RAM iu their initios willi easy
interfacing to floppy or even hard disc units
for esura storage. SiLcon discs were one of the
more original ideas for additional storage.
These would look just like games cartridges
but wi ul J contain t biiitill bu.leiy and up to
256K ;>f RAM on CMos chips which need
little powers :o keep the memory refreshed.

When you plug one of these into your micro
it will behave like a disc drive exc;pt wish
instant access. You can ur.plug it safely
without losing the information on it.

The competition was split into three
categories and although there was an
overwhelming response in the Junior and
Open sections we had relatively few group
entries. Many olthe group entries were meant
to be IBM compatible.

The best of these were the Phoenix — a
£230 128K micro designed by Hove Park
School Cumpuier Club and die Adept 42 BC>
sent ir by David Moore from Dorset, which
has a buik-in d.sc drive. The 42 BC has a

number cruncher unit in addition to the 8088
10 speed up calculations — this is a primitive
form of multi-tasking — letve out the wore
primitive as David Moore suggests and vou
have "an ideal sel.ing point to :he gullible".

In top mode the 42 has 924 x 240 resolution
taking up a massive 57K of screen memory
The £450 price tag suggested for the Adept
sounds i lit;le opt.mistic for a 128X. machine
with a built-in 5.25in. disc drive.

The Phoenix attempts to squeeze extended
Microsoft Basic, Logo ar.d an operating
system into 16X. of ROiM. It also has a sound
range of 12 octaves — well beyond what
humans car hear — presumably in case there
are any dogs o: mating prawns in the
audience. Automatic Load and Save buf.ons
make the Phoenix user's life easier.

6502s were also popular with the group
hot 64, below, from Richard
heirnans was one of the best of

the j-jnior entries.

entries. Silicon City Micro was a £150
Comrrodorc 64 look-a-likc with o built in
detachable joystick. The cheaper ldK Prism
concentrated on making interfacing easy with
a MIA chip — miniature interface adaptor.

At Jun.or level the ur.der 14s were tot
afraid to send in circuit diagrams. Karry
Adams d.d with his anonymous 64K Z-30
micro. For £.70 it looked good value and well
thought out but 28 graphics mod;s would
frighten all but the most darirg new users. 10
year od Michael Davis's Zodiac, on the other
hand was a simple but effectiv: idea for t BBC
{continued on next oage)

Pocket micro, Danish hi-fi

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a^-*^ - ^^tm Mav's Perfect Micro

(cont-nuzd from previous page)
compatible 32K computer with i buil:-in
cassette driv;. Ifor.ly Acorn had had a look at
Michael's dcsicn the Electron -night be
blessed with cartridge and primer ports.
though the flat >creen he suggests would have
made the Electron even later.

John Niven from Oman, who t nought up
the LCD RAM counter, proposed a 48K.
micro with the odd mixture of Z-80 and 6809
processors and BBC-style Banc. Nicholas
Sf;ce«J waned ti supply four language
cartridges with his 64K Ideal M84 — Ba;ic,

LLcgo, Pasca and forth.
Heimaos Operational Technology, aiias
Richard Heimans from Camberley, had a real
keyboard, improved sound 64 K RAM and
6502 chip four about £120. A built-in
comp.ler was one of Richard's priorities.

....

In trie Open the competition was toughest
of all. Peter Au-Yeu.ig's submission — which
■vcsiisr nf its weight soon became known as
'The Book" was very carefully thought ott,
with a Z-80 and an 8085 but with only 80K
RAM aid no built-in storage for around &P0U-
£600 it would have a limited market. David
KinrniiVs porkn mere — half the size of a
oaper back book — was immediately
appealing. When you open it up there is a six-
tne LCD in the lid. The proposed 6502-
compatible CM os CPU is coupled with 64K
RAM.

The small size does not stop David Kinrade
from building ir. two joystick ports and
facilities fo- expansion. A little add on uni:
would make 128K silicon discs for mass
storage .

Hemming Pedersen from Denmar.< wen:
for a modular approach with Modem,
p-inter/plorrer ard even pnwer unit alt
designee to stack with h.-fi units including a
stereo cassette deck which doubles up as
computer sioragc. His FP Special would Pe a
64K 68000-based micro with rimote control
of peripherals and remnre joysticks
Maximum resolution would be 640 x 512 and
Flcmming Pedersen is working on a new
language called Plim for his FF Special.

Duncan Kinnaird's Aphrodite concentrated
again on peripherals — i-iHnHing i laser disc
payer and piar.o keyboard. The mos f
inag native entry came from TM Colver with
his go-anywhere portable micro incorpora:ing
a radio telephone, ;olour TV and video
rrrorrier. Two nasnetre nnirs raking video tape

would

cemputer storage

Colver's micro wculd have :win CPUs — Z-
80 and 65C2 — presumably CMcs versions
unless you planned tc take a yak loaded with
rar batteries in your travels. The radio
telephone might have to wait for cellular radio
before you could .make the most cf it and it
might take a couple of years before flat scteer.
colour TVs become c.neap and reliable.

So much for Your Computer's view of yout
entries. Now w; arc taking the leading designs
ir. each category to the computer companies
fcr their opinions. Watch this space. ■

*

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76 VOUR COMPUTER. APHIL 1984

Producing fast-action
games without the need to
learn machine-code
programming — Simon
Beesley reviews a crop of
games designers including !
the newly-released Hurg/

THERE ARE I-BVC* more dismal experiences
than playing a version of Space Invaders
written in Basic. The invading aliens dewdlc
acrcss the screen while your missiles take n-n
age to reach :hem. The face is tnat Basic is
usually too slaw for writing adecuale arcade
games. For best effects ycu need the speed

and flexibility of machine code. Tiui for most
of us learning machine code is a daunting
lask.

As an alternative there are now a number »f
programs which offer a mere rainless way of
writing arcade quality games. These arc cither
extensions to Bask ur full-blowi: games
designers.

Melbourne Houses'* Ilure is such a
program, Hurg, incidentally. s:ands for High-
i.evel, Uncr-Friend'y, Real Time, Games
Designer. The terms High-Leve. and '.Iscr-
FrkndJy rci'ci to the fact that by using Hurg
you cau design a game without writing a line
of ode — :he entire system is menu driven. It
offers, in fact, on extensive hier£rchy of
:nL'iius and sub-menus which between them
cater tor almost every aspect of designing a
game.

Define eight objects

Not only, for example, can you define up to

ejtjhi different objects hul you can also
animate each in 3 different way and determine
how it is to move. Movement can .nc described
in considerable detail, Vci. cculd instruct an
object 10 rnimii the movement <if another
Object or give a weighting to movement in
certain direcnor.s, Alternatively you could
define eight paths and link fout of than
together.

The animation facility is extremely
impressive, tach object can be given .tp to
eight limitation sequence?. I can ciiher he
allotted two differed: shapes for er.ch direction
or be made to pass through an entire eighi
shape cycle in every direction. Once vou have
defined il» shapes you ea:i set tile speed al
which animation occurs as well as the speed
win which the object moves across the
screen. Tie Shrpe Generator is one of the
most enjoyable features of Hurg. In effect it
lets you construct the frames far a carmen. As
soon as you have defined at lejst two different
shapes you can see your cartoon character in

motion.

There are c host of other options such as a
regeneration menu., a collisicn labls, and a
games vaiiation menu. To take just one of
these, the games variation menu allows you to
alter the pattern of a gome after a specified
event. Thus you could instruct the gliosis ir. a
Pacman-type game to move away 'Vom tie
player when .1 power pill has been eaten.

Although there is no facility foi designing a
background you cen loud in u prude fined

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screen. This means that an assortment of
cfiiTeren: gomes can be designed. Two of the
demonstration games included wirr Hurg
show its rangt. Manic Koala .s a creditable
Manic Miner type game with only one
screen — while Ms Hoi tense is 1 Pac-Man
variation.

Designing a complete game with Hurg is
quite a complicated business, '.he program's
facilities are so extensive that they need much
fuller explanations han are given in the
manual. Mort examples are nesdad. The
manual gives an example el" how to write a
s mple.game h.u this is rather sketchy. When
I cane 10 .design an Invaders type j;anie I was
unable to make my missile leave its silo.
Doubtless 1 hud i"iud- iin idsmentiry mistake
but detailed step by steo instruct.ons would
have been handy,

Quicksilva's Games Designer is easier to use
but more limited n is scop;, Essentially it is
an instant shoo: em up fit. Sever, game
formats are open to you Invaders,

Aslcroids, Scramble and so on — but these are
really a matter of fixing roe directions the
aliens come from and how your character
moves. The program docs not allow you to
design a game at the same level of cetail as
Hurg. So you are confined to producing
variations on the same shoot-em-up theme:
aliens approach and you bia;i them ovt o:~th;
o'.sieD.

Agam, it is menu driven. There are eight
options 01 tl-e main menu; Play Game. Select
New Game. Aliei Sprites, Configuration,
Movement, Attack Wives, Load from Tape,
and Save to Tape. Selecting any one lakes jou
to another section. The sprite option, for

example, 1 alien you lo a character cefiner

where yoi can define either your own player
and missiles or the enemy characters and their
missiles.

Included in the configuration sub-menu is
quite a sophisticated sound editor — a feature
lacking in Hun;. By moving a slide up gnd
down on five scales you can creue he sound
*.M' voir entice for explosions or missiles.
Given the range of different sounds that can
be produced this is particularly simple to use
as well u> being fun to play with,

Although you can give the aliens a l.mi.ed
degree of animation and set :he:r f lghi path
yo.i cannqt animate your own character. This

feature doey not begin to compare with
Hurg's extensive fccilicies for defiling
an.matioti and movemen.. Only one set of
aliens can appear on the screen at any one
time und alt move .n the same way.

Mor is .t passible to define the background.
The background option reduces :o a choice of
Co! OUTS and I he decision lo include stars or
not.

But for all its .imitations Games Designer is
(coiimueii on nsxt page)

YOUR COMPU/IER, APRIL 1984 77

(continued ffOtti prewous page)

a highly effective package. Tiie eight 3"re

defined games which arc included with it

v'.in\ dial vuu CUII CCtiaUlU desigt games Of

enmnericai quality. I. shoor-em-ups art youi
ta>te then this progam will alloiv j, ; ou la
indulge yourseil tc the full

Games designer programs, however, Save
rlicij fruMiatkiiiN. Fiicy restrict yuu u> a set
course menu wlt'ei Huig. for example, il is
possible ti> design a Pac Mai game but you
cculd not instruct the ghosts to move
intelligently. As :he hlurb for Interactive
Software's Sccpc pus. it, such programs
cannot satisfy thos? who enjoy "the challenge
ot tuc programming'

Scape is a computer graphics language. It
has 31 command words whiei ate tagged cnto

Basic Rem s.aieujc.ns. They eannw, hcwe.'ct.

be intermingled whh Basic. Once yoa have
written a Scope routir.c it needs to be
compilec into object cod; it. ai.otlici nca ot
memory. The idea is that once compiled youi
graphics iodine tin be. called iron: litstc

Entire game in Scope

You could a:so write an entire game in
Scope; although with only 31 commands on
hand this would be t daun ing task. Scope
does not allow loaiing point variables so the
sir.e and cosine lun:ticns cannot be usei Not
are there cemmands tor multiplicand!! and
division. User-defined characters need to be-
set ui iii Basic.

At first glame Vope's syntax seems raihei
complex. To set up the equivakeni .>t the
empty Uup

FOR A = OTOtOONfcXr
ri'i|inn"s In 1 folio w.ng comiujiidV:

TO REM Var.a.O

20 REM t_abe ;A:

30 REM Inc. a 1.

*0 REM Test. 194, a,100.A
But the languiej'-; graphic commands ike
Pbt,Draw and A.trare familiar enough; while
Fscr is a usefiii additiou Which Nc:t>lls the
screen one pixel in any dinvrion

By using Scope to bind up graphics
routines you could undoubtedly speed up
your Base programs considerably Ii is jlsc an
interesting introduction^ to lower-level
lan^ujges - a Dimprnfiisp hrtwren Basic md
assembly language. As an alternative to Scope

One COllld use ;: fully Hedged Bjsi l compiler
or r-'oitli

<iciard lay lot 's Fiih is a mote accessible
aid to writing fast games and, arguably, ins as
effective. One of "row Computer's regular

Company Game

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eoMributors Richard lay or needs, as they
say, no introduction. In jii interview he on.e
■.aid ttijt he likes to make machines do things
.hey an: not designed it: do. Having given the
/.Xftl High resolution aid speeded up its
loading rate. ,ic is n.>w doing amazing things
■or i hi- Spectrum hitth is j 4K. exienfiidn to
Basic which Lts you harness etlects normally
.inly available :hioug.i machine code It
supplies 25 new coivmiands and a tuithei . J
•unctions Ions; them you simply enter the

euii.inandi and ih*u paiameters ar.ci Ran

statements

l f.e .aii-c.-.! grcup ot con una. ids piovice the
specti am wiu a sprite acuity. 1 ic beauty oi

his is that since die sprites aie intermit
driven ih-.-\ meve mdep*ndantiy ot youi

rogram. iou can specify the direction ul one
oi up to 255 s.M lies and i her. .set t he speect and
"lumber ol pixel* thiy un.p at a time. UiKe
set in motion the sprites cany on moving
.villi-.' th« program uttcods u> corr.e thing else
il a^jmte coHidcs with jnoihei object ol \ceis
oft the ici'ecii L'onttol returns to Basic
.vhcieupon you can tediteci it.

Along with the sprue facility fifth oftetsa
liumlit. ul eth«r new comtionds. Aumul:
i hem a:e Sounds a lai more powcil.il
:iisliuc:toi'. than Beep, ai.d Rcplac: which
changes colours on screen n asinulat way :6
the BBu's V'DU W command Vi'ithCiet and
.'ctt yuu can siote a'A'nv aivy reciuuyalji

jection ot tnc scteen and men repntil u at a

ftom Ouichsiiva

new position.

i J tt logcthei thes: iacilitiej nake up a
highly uselui loo. tor writing quality games
without dipping mio machine code The
sprues are particularly impressive As they
can be szl to move pixel by pixel at a rste ot 5.)
lumps per second they are both fast and
smooth

1 he Cbmmcdoic 64 already las.sprirc; but
USlllj them n: Basic is a slow md tedious
business, Almost unchanged since the days of
the I'hl VvOiumodoe s Basic now loo<s a
iittle long in the tooth Ii has no specific
cammonds to rurndlc 3p>riies, high roolution

iyapiic\ or the o4 s sophisticated sounu chip.
To access these lacihties you must instead
rummage through the manual in search ofth;
requisite Pokes.

Siinoi"s' i Basic remedies this state ol uiLm-
li is an extension to Base which males s:ood
the res.deut Basic's shortcomings with j
lurthei 1 14 commands

Number of novelties

With the Siinnns" K.isic cartridge in place
Coininnaor.* s Kaitc can hold its own a:id
indeed leel superior to any other veisio.i ol
the language o:i the market. Betoic writing it
David Simons drew up u shopping iist ot all
the commaids unJ features he wouid lil« to
see in his idea Basic A:id her; they all aie.
structured programming features sach a*
Kepsat Until ai:d local variables;
programming md., such Auto, Iiu.c ano
Renumber; enoi trapping :omrmmds, extra
string handling commands, scroll coramardi
[oi any direct itn; and, ol course, an extensive
ruigc ol instructions to deal with scund. Ingh
icuolutien grsiphics and apriics 1 here .ne also
.. .-.uiiibti o: ncveliies likj iJclay wrnch vines
the late at wlucf a Itslinj: is printed, and
Uisapa which hides a piogum line as i
Security aid.

11k £iaphic» commands) in particclai. do
all yen ciut'ii hope for. lo mention ius: a lew,
Punt fills in an enclosed a ea, Rcc craws a
rctatigle, while Rot will rotate anc. expand a
predefined shape.

In return tor 8K of your KAA1 Simou'a
Biiic gives vol a remarkable number of new
software features, Some were sorelv needed.
vMlieis can be considered bonus extras. I he
puy is tha: Comrholor: cid noi think to

revvrke its Bo:iic ,ii the sutsc-t incorp^i.i mj,

seme of these features m the ROW

78 YOUR COMPUTER. APRIL 1981

ORICU6&48K) TANDY C
DRAGON 32 1

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UR (16K)

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Cornwall PL25 5JE.

Credit Card Hotline 0726 3456

MICR

Hi!

Your mission is to penetrate the enemy
scramble system and destroy their
^headquarters. You will start with three of
our latest spacef ighters equipped with
repeating cannon and twin bomb launcher.
If you succeed in evading the elaborate ground
defences, you will arrive at the Cave where flying
becomes more difficult. In the cave are UFOs, after
which you must avoid a hall of meteorites. Very few
pilots succeed this far, but if you do, then you must enter
J the Fortress, followed by the Maze. If you manage to destroy
Enemy Headquarters, then your reward will be a more
difficult mission! One or two player game.
Machine Language, High Speed, Arcade Action. Full colour
.^graphics with sound. Keyboard or Joystick control.

' Available on tape for

~- ORIC£5.50 DRAGON 32 £8
- TANDY COLOUR cB

1984'

Stores and
Cnmpulfir

As Tin- scxi-l'N CLEARS a surreal message
Hashes up in front of you — "Imagine* 1 it jays
"the Edinbargh Tattoo being held on your
iuuP\ The idea is that you wilt use Tat:ooas a
link word to remind you that tte Spanish for
roof is tetto.

It sounds crazy but it seems to work and
now companies like Acernsoft, Tansoft and
SUvcrsofi aic lauug to pioducc Linkword
programs teaching as many languages as
possible before the Simmer holidays. Tansoft
is in the lead at .he moment with French,
German, Ital an and Spun.sh learning
pecktgea alrcacy on ?.alc fui ilie Otic 1 and
Atmcs. Silversofi is releasing I.inkword
languages on che Spectrum and Accrnsofi has
already produced BBC versions with the
Election soon to fallow.

Ovei tit next few months Dragon Data and
Camputcrs will produce Linkwords on the
Dragon and Lynx. Engl.sh Software on the
Atari and Audiogenic is perfecting versions
for the Vic-20 anc Commodore 64. All his
despi.e die fuel that on paper Iinkword does
not look very impressive. All it claims to do is
teach you a 200 word vocabulary and i crade
grammai for whichever language you pick.

Beside the seaside

Wly then has .1 received such an
unprccedentcdly favourable respense from
the software houses whe reject hundreds of
programs for every one they publish? Foreign
language teaching programs for computers are
nothing :icw. The Atari among others has had
ore iince 1980. But most of these early
programs were expensive and over ambitious.
Tie intimidating eight casettc Atari package
ran to £40. Meanwhile two factors have
changed.

First the home computer has become an
ordinary hoaseiold good rather than ust an
exotic toy — potentially a learning naciine in
every home. The software houses have
realised thai the millions of families who now
have micros are a ready market fir a cheap,
fun way of learning the ropes of a foreign
language before gcing away on holiday — so
loag as the price is right - say £5 to r115.

Secondly authors have produced a crop of
lively programs which make no pretend to
teach a whole language but aim at quickly and
painlessly giving a potential louiist encugh to
get by on.

The Linkword method is only or.e of these
new ideas. French is Fun and German is Fun
by CDS are even more {.pproachablc — and
make gorjd use of graphics. The CDS tapes
which cost id each for the 48K Spectrum and
will soor. be available for the Commodore G4
give vol a choice of six scenes — house,
countryside, beach cafe, street and school

When you sclera on« a simple picture
appears on screen and then objects mntmsilise
out of thin a.r with their names in English and
the foreign language. The beach scene in
German is Fun, for instance opens with ;ust
the said and the sky visible.

f he sun appears, wi:h the caption "SL'N —
DIE SONNE" and gradually t.ie whole
seaside scene builds up — with ever, a
bouncing beacfcball and l radio which blares
out "I do like to be beside the seaside.' Then
it tests you by showing the objects ind asking
you to type in ihc Germzn name.

CHEER UP!

IS EASY

One slight problem is thai it will only
accept the correct letter each time so yoL find
he answer by trial and ^rror. The program is
certainly fun and would quickly interest a
young child but at the mrjment there is no
guide to pronunciation.

CDS is working on an audic tape for about
i4 to go with the program.

The Koimos language programs — French
Mistress, German Master and Spanish Tutor
— are more aimed at the needs ol schools bat
are available on the BBC Electron and
Sprr-trum and cost ±10.

You really need a teacher tc advise you on
pronunciation bu at least all the accents are
dtsflayed over the right etters, unlike the
Lin.<word program. Once you aavc grown out
of the Level A cassette 500 can shef our
another £10 for the Level B which takes you
further,

1'erhaps because Kostncs aims higher its
programs seem less fan and immediately
reward- ng thtn ihe others, but it docs gi^e
you the capability tc create your own lessons

and is a rmssive improvement on learning £
language from a book.

The Linkwo.d progrnnui will probably be
the lazy tourist's best bet for learning a few
words ar.d phrases painlessly. A.I the versions
on the different machines — even the
programs for the IBM PC and Junor, Sirius :
Apricot, Apple II and Macintosh whic'.i ACT
is developing are essential}' sim.lar

Imagine going green

Mil<C Gruneberg, the University of Wile*
academic who developed the system, supplied
each software house with the volcabukrv and
link A'oid examples Tor the fiur languages
developed so "ar. He is row working on
Cantonese, Dutch, Greek, Hebrew, Japanese,
Portuguese, Russian and Swedish. You will
get very confused if you try learning too many
of them.

As it says at one psin- in Sivlersoft's
German I.inkword for the 4£K Spectmm
"Imagine going GREEN after looking nt che
GRtJNEherg Linkword system for too long".

80 VOUR COMPUTER. AP3IL 1984

You'll
never
believe
the new
wonder
. ingredient
that's supposed
, to teach you
foreign languages in
a traction of the time
a phrase book takes.
Its a monkey
with a monocle
and a micro.
Meirion Jones
looks at the new
techniques home computers
are using to make
languages fun, while Mi(ie '
McCann tries to learn
.Italian in 10 hours.

Mike Gruneberg does not claim that
Linkv.Ui J will b; light for everybody, ".is iiot
the only way*' he says "but it is a different
way".

His imagination seems to be a strange place
irifestid by salmon leaping pver bullfighters,
bakers being chase;! hy bees, witty lebsters
and ol course monkeys, at .east tc judge by his
Linkwords.

The Japanese word for knickers is
pronounced 'hand? upon", or so I am :old. I
dread to think what Mike Gnincbcr* will use
as a I.inkword for that.

There is considerable variation in 'he prices
the companies are charging. For the programs
which most of them are supplying w.th an
audio cassette and a leaflet In each case all the
software house had to co was write a relatively
simple program for a particualr machine.

Considering they look almost identical on
screen it is hard to understand why Accrnsofi
charges £15 to Electron and BBC owners
while Spectrum users need only pay £10 to
Silversoft,

NEXT
STOP
ROME

Thi5 YEAR five million Britcns will Isave
these shores to experience the delights of
another country, another culture and, nore

otter than not, another language. Doubtless
they will return with tales of sun, sea, sand,
Lallan waiters, German beer-festivals,
Spanish fuxels an.1 French orry drivers. But
the language, whit about the language?

Wc Brhifh co not particularly like leaning
othe" langaug^s. We lend to stick to the
colonial belief that our mother-tongue shDuId
be spoken — or at least understood — by
anyone who should have the good fortune to
be addressed by the legendary "F.ng'ishman
abroad". Last century we conquered an
Empire to prove the point. Churchill's
"History of the English Speaking Peoples"
did not help natters, ar.d now th; Common
Marvel has only confirmed out linguistic

prejudices.

The result is that many of the five million
intrepid explorers will htve only a few phrases
cf the 'ancuage in question, and these will
probably hive been acquired from an out of
date phrase book during the quieter moments
cf the channel crossing.

But it is possible tc lezrn :he bate essentials
cf a language — 4U0 useful words and enoug.n
jiratniiiLr tc. put them into simple acntcncis —
and learn then quickly. That, at .east, is the
claim made by Tsnscft of Cambridge. In fact,
'.'ansoft claims that the computer-cased
course can te<ch the basic* in ten hours, as
opposed to 40 hour3 using more familiar

methods.

For £13 you get two tapes and a sma.l
manual-cutn-glossary. One tape contains 10
computer progmms, each containing one
section of the course, while the oth;r is an
audio tape lo each you the pronunciition.

An ugly brute

Trie Gruneberg Linkword Language

Course (well, the name makes a welcome
change from "Ultima Zone" or "House of
Death") was designed by i professional
psychologist, Di. Michael Gruneberg, of
University College Swansea, ard uses an
unusua, but effective methed to jog the
memory anc make learning fun. Dr.
Gruneberg is in fact somsth.ng of an
aithoriiy on memory, hav.ng published
numerals papers on the subject since J96 7 .
N'ow ht has teamed up with a fellow academic
frnm the relevant language department in
Swansea and computerised the lot.

Trie course works by giv:ng you some
strange instructions, such as:

"The Italian for Ugly is Riutto.

Imagine look ing it an igly brute"

You then co precisely this for ten seconds and

Concencate on the message telow for
10 seconds then tjrn over the page.

then go en to the next word. After en words
the computer gives you a quick test translate
fiuiu Italian iu.o English arid Englis'o into
Italian. You then sit back in your chair with
pleasure and surprise as you realise that :he
system does work.

The course is divided into .0 sections, each
one teaching you abou: forty words using this
routine, interspersed with sonte eajy-to-pick-
up rues of grammar, and before you know it
you tre constructing your own sentences.
Each sedon takes about an hour io master,
including listening to and repeating the
pronunciation on the audio tape, hence
Tansoft's ten-hour claim. It is advisable,
though, not to cram then togethei — one a
day for two weeks is probably what the Doctor
had in mind.

The Earth is black

Some of the sentences you arc as<ed to
translate are mildly eccentric; "the Eirth is

always black", for example, while others arc
worse than the "posiillion-slruck by
lifihtrinj;" variety. How many times have you
had the urge to say "The bonnet and the
wheel are very hard, but why is the steering
wheel iii-i titan.?" Tlmm sue iwu residuus An
this apparent shortcoming: to illustrate the
rules of grammar and to avoid line parrot-
fashion recital of stock wotds and phrases.
Stimc of the more outlandish examples
actually seem to Mick in the mind because
they are so ludicrous. At any rate you quickly
piogress to such useful b.ts of information as
"In July, August and September the water is
very dirty".
The Giuueheife System uses a uea lalU.-all

visua". image ibr words which'sound the same
in English js .hey do in another language.
The 'calian for piano is "pianoforte", so you
are irvited to imagine a pianoforte covered in
spaghetti, 'llic French equivalent is a piana at
the tcp of the Eiffel Tower (lc piano). German
ar.d Spanish rely on the Nacioml flag —
imagine a mouse on the German flag {die
ma us).

Some of the link} do confuse matters,

though, .t would surely have ben easier to link

(continued on nex: page)

YOJR COMPUTER APRIL! 984 81

So now yoc Hrow the Spanish foi monkey
using tftv Unk/vutU f^tinslpie.

(cont<nu?d 'rom prev'ous page}
red and whice w.th a well-known Italian
dr:nk, rosso and bianco, than to a "bank all
paimed white". And I icmettiberci] youd, bad
and ugly hy thinking of the film rather than
the linkworc.

One slightly disappointing aspect of
Transoft'a package is that it hardly uses the
coTiputcr's graphic 01 b.jund capability. A
brief flash of the Italian Hag ai the s art of
lesson 1 and then hack to a simple 2-colour
lot display. Sound is similarly limited; just a
sirgle bleep or musical note as each question
is answered. Giunebei-4 believes tha. giapl ics
and sour.d could pro.e to dc a distraction
frcm the learning process, and noints to
academic researrh 10 support him.

Ancther surprise is that the computer
performs each test in ex.ac.1v llie reverse order
to the learning order. My immediate rcact.on
was that the programmer was being lazy Liid
didn't want to write a raudorn-t rdir test
routine. After a while, however, I found
imsdi" ttriiiembriiug a ditTici.lt word b;nuse
it :ame before :>r after a mere familiar one.
Aid for numbers or davs of the week a set
order is in .ibviom advantage. The kecp-it-
simple philosophy :riumphs aga.n.

Operating the p.ofc an is easy — jus a
matter of prying Return when ycu sre
recdv to =0 on the next page or the space
bar if you want to hav; the recommended 10
seconds 10 concentrate on the -mgges ed
louse. Tais makes thecoma.:* Ideal foi those
who tre not familiar with a keyboard. Vou
can, however, type ir: vour answers S vou
want r .o, though the machine will treat the.se
in :he same way as befcre. It does no give you
a chance to luiilvi a wioug answer, for
example.

The computer takes most of the tedium out
of learning a language. In fact, it acts ir more
or less the same way as a school class mate
does — testing and ic-ich.ing a list of wu.ds
you have committed to memory I wonder if
Tansoft is eoinc; to incorporate rh s feature
into another program aimed a: schoolteachers,
which wculd enable them to write b a list of
words — ji even eliein.cul Ibitnulue — Liid let
th« pupils test and assess themsebes. I
certainly found this package a quick way of
learning — quicker thin the printed page.

One obvious disadvantage of a computer-
based learning system is especially apparcrt
with language. X01 mtny penple will take
their computers on holiday. Once separated
lion, dieii Orics, anyone who has used this
system has to rely on the glossary in the hand-
book which only gives English-to-Italian
translat.on of the -tOO word vocabulary. It
OerUinly cannot be used as a :ounst phrase-
loo)' ut dictionary, nrjr even as a guide to the
structure of the course. This seems to be
penny-pinching: anyone who uses the system
will have to buy a oh rase book if they really
want to be self-suffic:ent abroad, and I would
have cx->ec:ed University academics to realise
this.

Main use is for tourists

Fcr the mou part the courses have seen
ceMfcueil tc teach Vol words ycu will actually
r.eed 10 use abroad, whether you tre sunning
yourself or, the beach, ordering i m;al in a
restaurant or fuming in a broken-down car.
The one ;xceplion to this is ihe section
dedicated 10 rhe business man. The business
vocabutarly — words like shop assis:ani,
r.ricc, secretary and holidays — is probably
more use for small talk anc: the expense

account rather than the boardroom.

The audio ape is probably rhe most
irrpottant part of the package 'J here is a
world of dilTerencc between the spoken and
the written word. The Gfiuiebcrg system tells
you not to isten to tne pronunication until
yon are sniisfi-H with your grasp of the
comp.itei-wjitten word. Th.s strikes me as
being unadvcntunius. Mast cassette players
have lemoie control; it would have been a nice
idea 13 use the ;omputer to trigger the audio
rapt 1 (with rhe playback snekrt riiwonriected.
of course), and to learn on a real audio-visual
sysren. A refinement for the future,
perhaps.

The Gruneberg Linkwiud System is
surprisingly efficient -At rramming in short
facts in rapid succession. 3ut it should not be
taken too seriously: it is certainly not up to C
level standard, though it m.ghi ccnccivanly
replace the fust few chapters of a school text-
book, lis main use. w II he r or tourists who
w$nt to learn the bare _*ssentia)s r>f a language
— jus er.ough to g;t ty for 3 week or two on
the Costa del Sol. It's terlainly enough to
make me want tc convert my assets into
French Francs and parlcr with these lorry
drivers!

82 v OUF C3MPUTIR. APRIL 1984

NEWS FLASH' MARVEL SUPER HERCES ORDERS TOU.K. IN SEARCH OF COMPUTER ADVENTURERS. E.T.A. MAY 1st ADVENTURE IN7ERNAT ON AL

YOUR COMPUTER, A^RIL 1984 83

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A -IK CMOS HAM anil lithiim hnttci y unii. Easy SAVClnji 10>i

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ofZXSl. £29 95|

CRAMlf.-.JJl
Ing.-nious tarcwar:/ software allows his 16K CMOS P.AM with |

lithium luHeiy to CO-cxist in same memory area as ordtcary RAVI.

/XJ*1 can multitaik on iw completely indepeudem programs. £79 95 1

PR1NTER/MONI1 OR ACCESSORIES

MSfl Monitcr !i:and Toi RISC iikiu.

Sit, over ihe Bccb 17" x 12" x 3.75"
P&PG.50 £I9.)5

PSS Standard ptiitei sunds for

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P + I'O.50 £16.)5

PS1. l.arec model 17" X 14.5" x3.75"

P&PX..50 £19.)5

[PSC-3 lot Epson MX-I0I1 etc.

etc. :i"> l4'■y^.75'■
|P&PrV*50 £22.«
| CUSTOM PRINTER

HANDS for larger p-intcrs

P.O.A.

I POT Primei Output Irav lor

11" fanfold papei P&P£J.;t)

£16,55

UK. VA1 exlra. !No VAT mi exports P + P UK.
Kree Europe +5% — Overseas - IO n n TI.X 11574

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use your

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wru:h £liow ii I Lhb, LISTS, TEXT VERTICAL &
HORIZONTAL BAFCHARTS and GRAPHS to be drawn
quickly and easily onto the TV screen for photographing to
make technical colour slices. They ere user Iri end ly
programmes wh ch have automatic scaling and ; ormatling
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graphics and colour capabilities of tie SPECTRUM
computer. Quick colour ciangirg enables ycu to produce
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On 3 cassettes, 2 procranrms per cassette, complete
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Cassette J TITLES & USTfNGS

2 Horizontal O Vertical QAPCrfARTS

3 GRAPHS from points or equations

£12 per cassette, £30 for the full set.
Send cheque with order to:

Orange Enterprises (Dept. YC)

20 Badby Road, Daventry, Northants.

84 YOUR COMPUTER, APRIL 1 384

ADVERTISERS ANNOUNCEMENT

A YEAR IN THE LIFE
A SOFTWARE COMPANY

WIDGIT SOFTWARE, one of the first software houses to v/rite for very young children,
looks back on its progress in the first year and assesses its future.

I'rom a si ull siart a year ato> t'lDOIT Software is now o
re llijtid in itiini-: every Utah Slice) jud has iehieved a
liiih reputation fir quality and Lltefesling software for
Children. Dur.ng the voir they haw produced sever titl.\>
and anoihei Tout will be ready in the spring. One jf
Vidgit's hies, QUICK THINKING, was chosen Sy rhc
Mirror Croup Newspaper's software cnnipary
MfRXORSOFT, ;'oi its lauichin Novembr 19SJ, and ibe
Commodore 64 version reached number 7 h the Websters
Juris — j 1 1 unusual I'm I'm jn educattanal lapt.

LEARNING THROUGH PLAY

One M v'idgtt's xuid concerns is lu writs goad qujJi y
oitenaining rutcul which c, ves pond value "or tunnev
iTlrlKUl sacrificing uancant}. All ine programs are
vssen ully games, inn each has. cleat educational iim* arula
sound basis. The idea is ihai children team much betur

iiuoiodi j ',j\ . The \mi seice.;* Ltfagea .'i:.! Uk uujdaly of tide
|Tiip1"ics nuts' he appealing, full nf rnlour aid, where
.ipprvprtare. animated. H>e,h quality use oi graphic; must

K: appealing} lull ol' couloir uixt, allele uppio.uitili.-,

•minuted. UUh quality use A' graphics has became j
feature of Widgu prcducts nrd they "irni.y believe that

olil.-.'liiMUl m.lTCfbl jv*l the SOTM llrtlit) of itispln* -as nth*"

programs' An lai as programming is concerted. Tina

siys

' Vie u>e a mixture of tnichire cede und Basic: rv.acb.inc

-iid- for the graphics and hasic tu gc a cood decree af

ikxiHllty. VC'e «m in allow lor a variety nf lewis of pbv

jiul can rrjintain ihe merest d'a child as his c Iter skills

Level.jp."

HOW IT ALL STARTED

Kate ami Simon Detherkgc's entausiism for computers

vas t ie it itial dtiung ibiet behtid vVid^it Software. At ike
aces of J md i they were ready and keen to use computers,
hot ihesr was ne ctmnurical sottwatc a-ailnilr-. Their
parens Mike anc Tina had done quite i good ceal a*'
luogiauiuiing uii business iiacltiiics, but whei the
SPRCTRUM arrived with ils low price and super graphics
capabilities, tftey taw a market potential and Inmcdiatdy
><! about writing Material. With a generation g«p gtouing
ground cniiiputers Mike and Taiu were anxious ic vvrhe
niatetia) which yn.niu children and :hei: parents would use
rnget.icr. Thev hoped in pcrsaadc parents ro use
eotnpuccf^ uitd i:i.i. oiv:e the)* ":..,•_ hi.d 'aanca on'
cxpeiicnu; tin coaipu.ei vould lake it; rightful place as a
>tai:dtrc iom.'siic utility item.

I'm ni^ iho:r ekp^-'ionitO IS tvaCheCR, pa'eiui. and
|iKigiiiuni'.ers thej designed thtir (iisl ;el olbui tapes (H
nrc-srhndt and intant children. Wh:n lhes.e wer< produced
in V-.iy 118?, V'Vi- anil lina hid tittle irfei he".' the
business would uevebp. T'hty weie confidett tint ihe
i. -ii l - wis thttre . n.l thai (heir program had the quality to
he a cnmmertcal success. This confidence - .vas "ortLnaicly
*hjte;l In \X',H. Smiths who iiopLy put Widgrt Seftwace
or, it. shelves white l has been sslli:^ veiy sjecessfufly
tverv since.

WIDGIT SOFTWARE is available through^
W.H. Smith and many other retail stores

In case of difficult/ contact

WIDGIT SOFTWARE Ltd.

48 Durham Road, London N2 9DT

VtHfQft son ittwe is 3 mtmbir otitieGvMof Software Ho\j$e$

".Sj'aion :i:m Kite testing out soot: mrjic ivoffmtti"

By the middle of Au^us. a n:w tape PATHFINDER vas
rsadv for release, and with s;ve:ai idias r. the p peine,
Mike and Tm.i decked n \v;k time lor expansion, Lu:as
Fovifct ptm-i them it- a prngiaiv.ner, Vici*n:n Ha ling as
an educational alviatri iind 41 tie smic tiiute tUe> n-sjc
apptuaclied >y Mittorsoft. Tlte tape that the team ware
wormian on st the time was QI'IC.K TillNKlKCr ami was

puis i^h^J ii\ Mirronotr u\ K^v^mhvt,

Ry chisrnins ihe whofc Widpii r.iiii',i: vas tvaitahle itt
Boo:s, and >vith an expert martel sarniij; 10 take oil,

Wiil^il whs tin .1 41 t 1 ti liio iuv *n r*ivr*r KjKa

NOW AND ONWARDS

One of \v1d2irs hest liasans has bten vith Gordon Askew,
Gordon is Head ■«" a primary school in ChishtK iiiui has .1
grea dejl 01 vtxj iel;vari educaibnal expetieace. He aas
made itupur.ani con'xibilioni to Widgtt ir.c'.jdinr, their
must recent rele;se HUMPTY-DUMPTY, Work is now
in hand for four mnie releases, wo of which an- due fbt
pttb.ication eery soon. Some programs vill be leleated
Lhrough MlRRORSOFl' audotliers utieie: lit: WIDGIT
label.

"We enoy vorkiRg with Mi'ronol't," says A'.ikc, "apari
riots utecommencal hemfH agie.i deal isgamed Hum he

interchange Of ideas witch we «c: duiinR ihe
development,"

ViidRi' r.o'A - fed that thev have abroad Kisi- Of experience
and talents to stay in rh ■ ferefram oi' educational
soffvare

THE PROGRAMS

CO'.'KTIKO, ADDING S- SUBTRACtlNC and
tjt.":(;K THINKiycJ aj s iopo« w tieh dav^lop the conieipi
of nur.iher from a very early beginning. Ore was liken to
ensure thai the wry 'usi program un COUKTIKti could

opeult from t:x- vt:y simples! Isvcl aid he 1 na.vi
proyumi oi the tape develop Irum :h^, ADDING <S
SUBTRACTING makes sure the process ol'cvuul tti: can
elieeTin 1 y Irid inn s mplp sums Th?» aif % frt^ramson
lllis tape, wliich with its siuoe>lli -.end <,;:■■ and good, cl:ar
Kraj-hicshjs beer uniforra'ty veil tecieved hy the pn-ss end
schcols.

and

"Qumattduig prcgram for litjant sc*ook'' 'Ed.

(*trnp;rinv;)

"My juuottlilt education mpi" (7.X Compjiiite)

QUICK THINKING takes arthneticu stige farther; il
is now necessarv to do :he iurn< cneitally. The levels are
carefully graded from adding single digit nuTibrs 10 fast
tirre trals vhich stretch adults- The other pngran on the
tape introduces iiuliiplication tables and nunber
senuencing in a iiiaj,:iifi-.-aiit robul machine.

SHAPE SORTP.R is i tape to develop visual perception
and ils simple 2 key op:ratwn nakes it >uiuble as a first
tape for chi drea from about 2. The first prop-am is simple
shape recognition ard the second, HOUStS, which can be
used as the ;hild get* slijlitly old:r is a 'spot the difference'
game. On t.ie second level this en be qu ic hard >til mete
is - l lusely tew»:d. The :hird program is on size sorting.
"they jre superb early learning programs" (bD.
Cn.nj'u ing)

ALPHABET is a program for children as soon as they

.-flu Irnrn to Ti-i-npnise Vtrfft oil ihe keyboard. Clear, full
screen pictures illustrate cadi letter md there is an option
to -clare lover to upper case letiers. Ir is a nice piograia fot
anient and cliild to start usiae compaters toatiher.

PATIIFINDZR {for »gcs 4 to 9) is a series of 4 graded
maze came* fcanrirg artmals. All the mazes are lattdomly
geaerated and ao two are ever ihe same. They deal with
important basic concepts — up, down, lcl'l aid right, and
begin to develop the ability tc plan in advutce.
KANCAROO, the iecotd ptognm kads ihe player in the
direction of simple programming. The graphics are bold
and brjghtb,' coloured ard there is a aicc, but not excessive
use of sound. A;ain the reviews of this tape have been very
good:

"TktMgamn sfould prose very entertaining to play at uxHtu
prcvidug a very rea> cnailtngc'- (Crart Megazm)
"Weil done VC'idgit. A very tetil application for a totm
eonputlr, acwrly cxxuied and vthch 4oet run asl the earth'
(Iliimc Compittiig Weekly/

Ihe Hl'MPIT DUMPFY MYSTERY and YvIIO
KILLED COCK ROBIK ire two programs on the atest
tape from Wkgit inly recently released, and is, suitable
from early read:rs to ab')ut I It year ods. This tape cortaiiu
3 proji'iio-s d^sigiucd to develop logLal tliiuiuiifi ^i;d
metnoty. There are 2 games o discover which o* the
King's ! 2 tr.cn pushed Humpty off the wall, in tlte liist \>r
aehing qucGtionc oad'or guee^ieg aad in th: eeeond, the
phyci gcti a glimpse of the culprit but :hc; his to
remember and icsctibc him Cock Rabinasks ihedaualing
cjiKSlion "Can Splrrov's -.-onl:ssicn b; btlievid?" and
.'::.'■ .;.-li a process of logic and using the clue: prcvidci the
player must discover WHO killed Cock Robin, WH17RF.
and WHEN. These arc very appealing grmes. and are
certainly not exhmsied after one or iw pbtyiigs. Ther
ktd la a .oi of discussion when played b,- a grntp of
children and appeal to quite a wide age rang:.

COUNTING

,"K Spc:tiutx

l.«

ADDING iSUBTR;\CTIMG

I6K Speaiun

1.25

QUICK TtllKKIHa

4l»K HpL.lJul^

Coomodore el RRC B

a:id Elecion

Q.Vt

SHIVPE SORTER

IbK Spi-.li un

1.25

ALrH;VJ3ET

1BK Spunnin

5.25

PATH UNDER

16K Spcrtrun

5.05

IKMITYClWinY

4&K Spt:trun

6.25

LOOK SHARP for 'LOOK SHARP'

Widgit's next tillc from iMirrorsoft

VOUfl COMPUTED. Z^PRI. 1981

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4.

Loose lips sinks ships. So can Vince
Cockett's Dragon.

10 CLEAR 1000

20 PQKE65495,0

30 PCLEAR8

40 GOSUB1020

50 B0SUB420

60 PI-57.2957B05i JA-lOi JB-lOiHrt-1

70 IF6=1 THEN 150

80 JA=JA+ < JDYSTK < 1) =«0) - < JOYSTK < 1 J =63)

VO lhJtt^U IHtNJtt=U

100 IFJA>90 THENJA=90

110 MA=SIN ( < JA> /PI ) a MD=COS < ( JA> /PI >

120 J8=JB+( (JOYSTK <0)=0)*2)-( (JOYSTK t0)«63l*2)

130 IFJB<0 THENJB=0

140 IFJB>90 THENJB=90

150 LINE(2,16»-(JA+2,20) ,PSET,BF

160 LINE (93, 16)-(JA+3,20J , PRESET, BF

170 HNE(2,2S)-(JBf2,32> ,PSET,BF

180 LINE(93,2B)-<JB+3 f 32J , PRESET, BF

190 MX=SIN((JB)/PI):MY=COS( (JB)/PI>

200 P=]NT(100+(MA*MD) )

210 SX=10+(5*(R*MX)):SY=200-(4*(R*MY))

770 TF R=0 THFN TF PEEK C652QO) =254 OR PEEK<652B0)=12fc

THENPL AY "01 T255V2CAV25AV30T20AV< T< AV< T< AV< A " : ST= INT ( R/

8>:S=1

230 I TG- 1 TT (CNCI 1— CI 1*1:1 TCt l-ST TV IENGQCUB330 : G-O : CH-O

240 IFSC=6 THEN NE=NS+1:SC=0:FDRT=1 TC 4s PCQPYT+4 TO T

s NEXT : G0EUB950 : HA=0 : GDT060

250 IFHA=0 THEN70

(listing conthued oopcsite)

xjf/

**•**£

. . ■ . : .

'. t I I. .11 >■■ » '* ' V- '* !W IT""* T. '»

4I 1 *' \ !'.' 'I 1
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•:*****j ■■'■*( ^**;

86 YOUR COMPUTER, APRIL 1984

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Tm-: GAME CONVOY is ; shooting ^arae v/irh a
slight difference. Positioned ai ifcc lower left
corner of the screen is an artillery gun over-
looking cr.e sea. Sailing dose in sttorc is a
convoy of enemy ships. By aiming the gun,

iisinjj the joySl'Vkj tin* ronvoy has to be

knecked out,

However, the range of the siell can be
varied, as in a real gun, by varyir.g the eleva-
tion. Aha ihc further away from the gun the

target is, the longer rhe shell will ink:- tor**srh
ii thereby allowing rhe ship to sail away from
iht: original target area.

The gtme is in Mode 4 Blacx and White.
Hbwtver, by working the lirsi part of the
picture drawing routine in Mode 3 snd clear-
ing the screen to either colour 6 or 7 and then
switching in:o Mode 4, a blue background :an
be achieved:.

Furthermore if, while still in Mode 1 lines

arc drawn arrrnts the wnire, n<ii\p ihs alter-
nate colour tn the ane already chosen to c car
ihe screen, every second line posiiior. down
tr.e screen a.i extra pa.e blue/grey background
C; : n he provided.

Kote also that because two modes have been
used to build ihe picture, twu different resolu-
tions of drawing can be achieved. This has
been used to create the textured clouds in the
same.

i 1 i ■>. i

, fry >»■♦»»

TT

4 A-

r

(listing continued from opposite page)

260 FORT=l TC 6: TA(T,1 ) =TA(T,1) +2: TA(T,2) =TA<T,2)+RN»(

33-2

270 IFTA(T,1>>235 SNDTA !T,3> =0THEN1260

280 IFTA(T,2)<48 THENTA :T,2) =4B

290 IFTrtfT,2>>150 Tl ICNTA < T, 2J-150

300 GDSUB10OC

310 hEXTT

rv?n nnTn7o

330 IFSY<43 THEN403 ELSEPl_AY"T20V3DO4V/3OCV20CV10CV5C p :
F0RJ=I TO 4»BET(SX,SY)-(SX+7,S>'+7> ,EL.,B:PJT(SX.SY)-tS
X+7,SY+7) ,3P,PSET:-ORDE«l TO 50: NEXTCEtPUT<S)c ,S V ) -(S»
7.SY+7) .BL.PSETiNEXTJ
340 FDRT=1 TC 6
350 IFTA(T,3)=1 THEN370

360 Q=S)C-TA<T,l)+4i IFQ<:6 ^NDQ=>0 THEN3B0
370 NEXTT: RETURN

380 Q=>SY-TA(T,2>: IFGK4 AND3=>0 "HEN3S0 ELSE370
3TO irT-7 THENRETURN ELSE TA <T, 3> -1 ! SC-SOl I HJT :SX , 3Y)
-(SX+7,SY+7),BL,PSETsPUTm(T,i: ,TA(T,2' ) -(TA(T, 1 >+l 7,
TA(T,2)-H1> ,SL,PSET: RETURN

4O0 FQRT=1 TC 4 ! DRAW"BM1 10, 44ClNR'1U4fi4D4BR1NlJ4R4NU4BRi
U4L2R4Brj4BR8;NR*U4R4D4BR4U4NR4D2NR4D2BR:2sR4L2L4U2 : ?4BD
4BR4NU4BR4U4NR4D4R4U2NL2D2BR4U4D2R4U2D4BR6J4L2R4" : =1_fiY
"T25504ftBC0EFGa5ABCDEFG n :PJT(110,3S>-<2:O,44>,A,PS=TtN
EXT: RETURN
410 RETURN
420 PMODE3:PCLS7

430 DATA129, 131, 135, 138,131, 130. 143, 132,143,133.133,14
3..13B, 1.43, 129, 131 ,.133, 138,143, 138

440 DATA133, 143, 143, 138, 143, 138. 143, 129, 141, 133, 133, 14
3, 13B, 143, 133, l*-3 , 1 3i, l^V, 141 , li/

450 DATA 133 , 143 , 1 43 , 13B , 1 43 , 138 .143, 133, 134 , 133, 133, 14
3, 13B, 143, 133, 1*3, 133, 143, 138, 143

1AO DATA132, 140,143, 13Q, 140, 136, 143, 133, 143, 133, 143,13
4,135,143, 132,1*0,133,143,138,143

470 DATA174, 170, 174, 234, 184, 126. 176, 59, 224, 7,0,0,128, 3
,192,6

480 DAT A36, 36, 36,36,60, 153,129,231

490 DATA63,255,252,63,251 ,248,63,249,24: ,63,250,227,63
, 253 ,69 ,63, 253 , 1 42,63, 254 ,29 ,63 . 230 , 43

500 DATA63 1 226,55,63,192,U5,63,20B,235.63,129,221,63,
131,173,63,133,70,63,174,146,63.221,56
510 DATA63, 187,121,63,119,57,63,239,51,62,223,47,61,19

i, L3a 1 ^jiK/f^o/ ( W|XK> t 2aa

520 F0RT=2 TO 9:READA,B: POKE 1537+ <T*32) ,A> POKE153B* (T»
321 ,B:NEXT

; ■ . ;

"*,

'**

H|

m

±E*iA**_

m

530 DIMB0C20) ,SL(20) ,BL(2) ,TA(6,3) ,A(36) ,SP(2)

540 6ET(4,0)-(21,11> ,BO,G

trsu 061 (4,^0J-t21,31) ,SL,B

560 FORT=0 TO 7: REAQA: POKE 1536+ (~*32> ,A» NEXT

570 GET(0,0)-(7,7) ,3P,B

580 PCLOii

590 CCL0R7

600 FORT=0 TO 4B STEPS

AIO I INF0,T)-(255,T) ,PSET

620 NEXT

630 FGRT=0 TO 31 iPD<E1536+< 48*32: +T,RhD< :2B>+ 127: NEXT

640 A*="LJ2RU2RURUR23R;D2RD2

650 B*="D2RD2FDRDR2UR2U2R2U2

660 DRAW " BM90 , 20 ; C5 " : EOSUB630

670 DRAW BM1 6C , 30; " ! GCSUB68D: GOTD690

680 DRAWA*+A*+A*+A*'t-"EH-4,+6; "+A$+ M BM-36,-3| U +B»-B**-B*

+B*: RETURN

690 PAJNT(96,^0) ,B, 5: FAINT (102,20) ,3,2: PAINT ( 124, 20> ,B

|3

700 PAINT(166,30) ,B, 5tPAINT(172, 30) ,B,5:PAIMT (194,30) ,

8,5

710 Y=150

720 DRAW"BI10,15O;C5''

730 LINE-(X,Y),PSET

740 X=X+2:Y=Y-RND(At+4

750 IFY<194 THEN730

760 PAINT (5, 190) ,8,5

770 PM0DE4

780 F0RT=2 TO 8 STEP2

790 CIRCLE(230,15),T

800 NEXTT

810 bU-iJ...(jt(ihK*j/i

820 F0RT=O TO C22*32) STEP32sREADA,3,C:PQKESU+T, A:PDKE

^J+T+ 1 ,B; POKEGU+T+2, C: NEXT

030 UtNC>0,0> -(96,40) , PRESET, BF

B40 LINEi0,0)-(96,4B) ,PGET,3

050 LINE'2,2)-(94,46) ,PSET,3

RiSO I TNEIO,0>-(2S5, 192) .PRESET, B

870 DRAW BM4 , 8; NR4U4R4D4BR21 ; U4NR4D2NR4D2R4BR4NU4R48R4

U4NR4D2NR4D2R4BR6H2U2BR4D2G2BR23;R4U4L4D2R4D2BR4NR4U4R

*D4

QBO DRAWBM4,44;NR4U4R4DiBRlljU2NR4E2F2D2BR4NR4E4NL4BD

4BR4NLWBR4U4F2NDE2D4BR4NU4R4NU4BR6U4NL2R2BD4BR4U4D2R4U

2D4BR11 ; R4U4L4D2F4D2BR4NR4U4R404

B90 GET(110,38)-<210,44) ,A,8

900 t.INE(B,lB4)-(33, 159) .PRESET

910 LINE«7,1B4)-C32, 159) .PRESET

■?23 I.INE<i-, lfl4)-(32, 138J , PRESET

930 ECREEN1,]

94> FDR-=1 TO 4.PCDPYT T T+4: NEXTT

950 F0RT=1 TO &

960 COSUB970:N£IT:RETURM

{listing continued on psgc 89)

YUJK UUMKUI tK AWIL 1 a»4

■t£8*fc]iMMH4

i

88*

#

w

#.m>y

"*& '

You have assumed complete control of your
wc-rld's ast ftghter-kller class spacecraft. It is
only you who can prevent the ult mate disaster . . .
the destruction o 1 ycur civilisation by the
SEIDDA3, an unscrupulous race 61 murderers,
intent on total control of your star system. Locate
the enemy fleet on your Rsdar. Chase the
SEIDDA3 craft across space sgainst a background
of stars. Fire yout laser bolts when you ha^e ihem
in your sight. Ref jel and go on the offensive
agair. Tic game goto ptog-cosively harder Fleet
after fleet of SEIDDAB ships attack.
Keyboard or joystick control. Fast machine code
H -Res action. .

7M,

MOTHER GREAT
{AGON PROGRAM
IOM HEWSONS

RAGDNflYII

m

£695

Hi-Res flighl simulation.
Two runways, f ap, speed,
bank and attitude cortro .
Heading, bearing,
instrunerit lancinc system etc
Joystick Dr keyboard control.

Mail order tc: HEWSON CONSUL IAN I S
60A ST VIARY3 STREE"
WALJNGFORD OXONOX10 0EL

ting co.itir.ued from nage 67)

1050
1060
1070
1080

His

970 TA(T,1)=(RND(21)*2)-21

980 TA(T,3)=0

990 TACT,2)=RND<100)+48:IFTA(T,2)<50 THEN990

1000 IFTA(T,1)>2 ANDTA(T,3>=0 THENPUT (TA(T, 1) ,TA(T,2) )

-(TA<T,1)+17,TA(T,2)+11> ,B0,PSET

1010 RETURN

1020 CLS3sF0RT=32 TO 160 STEP32s PR I NT@T, STRING* (32,207

) ; : NEXT

1030 PRINTe480,STRING*(31,233);

1040 PRINTe0,STRING*<32,233) ;

F0RT=32 TO 44B STEP32

PRINT@T f CHR* (233) ; : PRINT@T+31 , CHR* (233) ; s NEXT

POKE 1535, 233

P=1159

1090 FORT=0 TO 19: READAs POKEP+T, A+64: NEXT
1100 P=P+32sF0RT=0 TO 19: READAs POKEP+T, A+64 1 NEXT
1110 P=P+32:F0RT=0 TO 19: READAs POKEP+T, A+32: NEXT
1120 P=P+32:F0RT=0 TO 19: READAs POKEP+T, A+32: NEXT
1130 A$=STRING*(30,42)+ ,, Y0UR ORDERS: -ARE TO SINK THE E
NEMY CONVOY SAILING CLOSE TO YOUR SHORES BY USING YOUR

SUN POSITIONED AT THE BOTTOM LEFT OF THE SCREEN. USE
THE RIGHT JOYSTICK TO CONTROL THE BEARING & AZIMUTH AN
D THE BUTTON TO FIRE"+STRING* (12, 175)
1140 PRINT@303,*'BY" 5 sPRINT@362 , "VINCE COCKETT";
1150 PR I NT©456," INSTRUCT IONS (Y/N)";
1160 I*=INKEY*:IFI*="" THENU60
1170 IFI*="N" THEN1240
1180 IFI*<>"Y" THEN1160
1190 F0RT=1 TOLEN(A*>
1200 S0=1+ (PEEK ( 1502) AND11)
1210 PLAY"T10;V5;"+STR$(S0)
1220 PRINTG449,MID*<A*,T,30) ;
1230 NEXT

1240 PRINT@454," PLEASE WAIT A MOMENT ";
1250 RETURN

1260 PRINT€454,STRING*(24,175):

1270 IFSC+(NS*6)>3 THENPRINT6295, "WELL DONE GUNNER****
": :ELSEPRINT@295,"BACK TO THE TRENCHES";
1280 PRINT@359,"YOU SANK "SC+ (NS*6) "SHIPS" ;
1290 F0RD=1 TO 10O0:NEXTD
1300 PR INT@455, "PRESS SPACE TO PLAY'
1310 IFINKEY*<>" " THEN1310
1320 F0RT=1 TO 4-PC0PYT+4 TO TsNEXT
1330 SCREEN 1,1
1340 G0SUB95O
1 350 HA= 1 s G=Os NS=Os SC=0: GOT060

'!■

YCUR COMPUTEF, APRIL 1934 89

The Key to Spectrum Machine Code Success

PIcturesque's machine com system Is used and recommended by professional software writers, vet the excellent
documentation and thefrlendly, easy-to-use prog rams have been highly recommended for beginners,

You will only buy one Machine Code $Y5tem,so buy the best,theone ^professionals use.

NEW IMPROVED PROGRAMS — MICRODRIVE COMPATIBLE

ASSEMBLER

Completely self-ccntained
withi:scwr line editor, giving
an easv-to-read 4C column
tabulated listing. Auto line
numbering, line rerumbering
and auto tabulation make this
one of the fastest and easiest
Assemblers to use. 5-
character label names
Decmai, HexorAscn
constants. SAVE ''LOAD:
VERIFY bcth the listing and
Machine code to cassette/

MICRCDRVE/NETWORK.

Assemble from cassette or
Microdrive into nie nur y fui vei y
large programs. Customise to most Centronics
printer interfaces, or RS232 (with interface 1) for 80 column
printout, fast assembly — ik O" code in 7 seconds.
Assembler Directives:- CRC, END, DEFB, DEFvV, DEFM. EQU,
DEFL. (Microdriv= and Centronics facilities
only operate wi~h 48K machines)

£8.50

INCL'/ATSP&P.

MONITOR

The iceal tool to help the
begirner get started, yet i:
contains all the commands for
the experienced programmer
to run and de-bug machire
code programs. Inspect and
alter memorv contents in
Hexor ASCII. Breakpointsand
full Register display. N3W
WIIH SINGLE STEPPING
through RAM or ROM.
Disassemble any part of
memory, ram or ROM. Dec-
Hex- cec number converter.
Printer outpu: to ZX
pr nter or via RS232 (with
interface D or customise to
most Centronics plnter interfaces. General memory
management commends ircltde Hex djmp. Insert,

Delete Fill and Move. Can reside ir memory w th the
Assembler <<38K machines only: to give a complete
Machine Code programming system

£7.50

P ■•iO'.-. 'l^nnr iftfl Mi. - v.w* •.'i-'h -*| it mil )■■ n*<;>' im'n v*." »o.t- iv~ icr-ft "icip i-.r ;'i-^l.r.:

IKCLVAT&P1P

Ex&lng owner; ran otfcunche new diurMirobv raturninccre cassette wilY"oPcuir?5Qiie, along wuh jcneciue.'PO. for !
ei.so per pragr am liw. W1 & >w qewc.iwtrwwiii ye m nrii'd ftv rjturn r.t post

Available from the "Spectrum" chain of stores, brrncict of John wienrics and all good computer

shops, or by mail order by <endirg cheque. 'PO to:
PICTURESQUE, 6 Corkscrew hill, West Wickham. Kent, BR3 9BB. Send SAE for details.

■
P

tiiURftUUL

TURESOUE

CTURESflUr

CTURESOfi

NOW

SPECTCJUM
and 7-xbi

^vV.VL^^

mats

Bust*te$$ n

-m/c COMPiURS

BMtCATlONAL

Y0t/Am$TTAPt

"ifwvioiff WPW/

FRB0

PLUS

Of$COi&Sfy

W~ (/pier

I rntmr f GfcflW* Owio!"-! S'wo u Ltt^oryl

NQWRBAO rm FACTS

We were ire that Snclar library, anc ftate since

bull U|* ti vjil llwh- llUU.t ft Jill Wtfl £00 Ulllfltfill

p-3flre-i5 cistrrvj up la £16 =ach we ma-nlalr a
npWM swvicfl witu up (o 30 co>lea ol lha rust
popula* onto We're run nol rom a bart-rcom bm

From y.ir pirn -ilrjp pntf o'Hc04 whbh rrembo'a con

vijil or phOtO. Six sSilf fiivo pTQMlt, Ifiondly help.

I ! l ,: ..! ' Irni i ■ .-« |. ,.■ : r:i- UfKj ij i-.r;-,;i <M*i :;.il i-*;n H im

To: SOFTWARE LIBRARY, Farnham Road, Wesl Lisj, Hants GL'33 6JU
NAME Machine

'ADDRESS..

Special offsr from tills Issub: LIFE MEMBERSHIP £0
IncrmaHy K. 50). Overseas (Europe onlyl £1C, or p n a local branch:
Scjndiravia Hade' LyKk«$ve| 33. 2309 Copenl-ager S. Denjlui:
Jacobsnltsitan ;S, B-24O0 MOL, Bolpum. W.6trrTtny: Posilacn
78«9, -ieoo BlvlMo. 3vAM«e PO Bv» itoj, Mwutai, SwwKand.
Eire; 1S2 Sojlh Circular Rd. , Dgblin 6. YC J

A BUREAU FOR
YOUR COMPUTER

ONLY

£29.95

- £6 P&P

'Easy to asssmble
*Robjstlv built

•Rich leak finish

'Adjustable divider
positions

* Bic] storage shell for
rnanuals'& lil)r.i.-ies

x App r nv >ii7ft
width 3?" height 36"
depth 19"

PLFASF *LL3W 2 1 OA v S FOR DFl IVFRY
POST THIS COUPON TOOAY'

f^loase send ne a Computer Bureau

I crclosc a chcque/poslal order for £35.95 (incl P&PI,

Mamc

AdcVes;

PostCoue

Send to:
Stuart Tables, Unit-1 . Stechford Trading Estate, 3'ham 3338BX

90 YOJFS COMPUTER. APRIL 1984

Listing T.

260

NEXT

2 D0KE«9C,#^Ay

Z6E3

»0i Y=0

5 SOSUB 1000

270

FOR 1=1 TD 53

10 PRJNTCHR*(6)

200

P.EA3 AS

IB CLBiINK 7:r>Ar i :ri 4; PRINT CHFt*U7>

290

CUR3ET 30-*X,7C-*-Y,O

30 PLOT 5,I,t0iP_OT 5,2,10

300

CHA* AS, 0,1

40 PLOT 11,1, "ORIC LANDER"

310

>=X + 7

SO PLOT 11 ,2, "OPTC LANnER"

320

IF 1=24 "HEM X — 20iV-3O

60 PLOT 11,3,"

330

335

NEXT r

0AT=i 0,63,0,0,0,0,0,0

7 PLOT 10,5, "By D.Salisbury"

75 PLOT 10,6,"

340 DATA B0,a2,69.S3,83,32,73,?;7,70,79,H',-'
34,82

.T?, 7.T , 7R , R"< ,

90 PLDT 3,10, "Controls i~"

90 PLOT 6, 12,"Curscr Up - Thrust Jp"

350

DAT3 85,67,34,73,79,78,83,80,82,49,83

B3, 32, 82, 69,

100 PLDT 6,14."Cjirsor Down - Thrust Right"

84,85

110 PLDT 6,16."C.trsor Left - Thrust Laft*

360

DATOi 02 , 78 , ~.2 , 70 , 79, 82 , 32 , 65, 7B, 79 ,84

72,69,82,32,

130 PLDT 6,18. "P - Pause On'

71,65,77,69

L35 PLDT 6,20. "S - Pause Off"

400

GET A*

140 PLDT 9,24. "P'ess any key to start"

410

IP mjL(H*)=/J iMtN IbMiHUfU lb

150 PLOT 8,24,12

420

IF ASC<AS><>13 THEN 4C<0

190 GET D*

430

FOR 1=0 "0 *

2O0 INKOiFVPCR7i-»IPeS

440

POKE M 66+; ,48

205 I NK7:P£PER0 SPRINT CHR*U7»

450

P0K=:#EFDA+I,4E

207 CALL* 1978

460

NFXI r

210 CGLL4115D

47.:.

POK£«e.:.,s

211 POKE#8C,3:PO<EM87,0

475

CAL_«1978

212 P0KE2,IiPQKEl,255

480

CAL-#1177

213 P0KE?.5O:POKE4,255

490

GOTO 211

214 FQKE11 ,250lP3KE7,25O

9O0

END

215 POKEttSS ,5: PO<E«BFD 1 ,53

100O FDR 1=0 TO 7

220 CALL#12D8

1010 RE3D X

230 RESTORE

102O PD<E 46840+1 ,X

240 FOR I=C TO 7

1O30 NEXT I

250 READ A

1050 RETURN

Tins GAMF IS wrirren "nr rhe 4HK Orir-1
micro and involves trying to land your space-
ship on :he suiface of a plar.et where .hen; is
only one small area flat enough to land on.

Yoa start off on the back of the rnothership
f'rnm which yon must rake nfl'wirhnn" flying
into :he aciJ couds it ihc top of the screen
Since gravity is continually pullir.g you
towards the planet you will need to use you;

thntsters to control your descent Having
taken off you must navigate your way past the
mcthershp and avoid the satellites to reach
the landing site which may be anywhere on
the surface.

Yniir n^lmive spare's arc vhown on the
horizontal and vertical speed indicators. To
land safely your vertical speed must be below
about 2o and both feet of your spacecral. must

be on the flat ar?a. If you land successfully
you will be given a certain number of points
depending on how fast you did it, find the next
landing will be harder.
You are given five ships to start with and

ydii will low - ship ir%'nn Hit the mothe'ship

or a satellite, fly into the acid clouds a: the top

of the screen or land in the wrong place. You

(continued on page 93)

YOUK CUMPU I fcK, APRIL liiH4 «1

PRODUCTS FOR THE VIC-20 + SPECTRUM

SPECTRUM OWNERS!
NOW AVAILABLE

THE ULTIMATE IN JOYSTICK
INTERFACES

THE FOX PROGRAMMABLE
AN INTERFACE WITH:

INTERFACE -

* Complete compatibility with all programs.

* In-built memory to store up to 16 different
games keysets at one time.

* Battery oack-up so no loss of memory after

-k Full ccsing.

• Through port for further expansion.

* Proven compatibility with the microdrive
power off. (Battery recharged curing tse so no* Built-in pseudo Rom facility with room for
replacements are required) personnel tool kit.
One switch only for simplicity of use. * Compatible with all Atari-type joysticks.

The superior interface without awkward trailing leads, just plug in and start your game.

LAUNCH PRICE ONLY £34.95 incl

SPECTRUM
UPGRADES

wr 0^ £21.00

FOX ELECTRONICS LTD. 1NCLUS ivi TuZ\ 2 ™chin es on.y> F°X ELECTRONICS LTD.

A high quality kit at a new low, low price which simply plugs into existing socket
within your Spectrum, no soldering is required and step by step instructions are

supplied. Takes your 16K to 48K in simple steps.
PROBABLY THE BEST KIT AVAILABLE AT DEFINITELY THE LOWEST PRICE

AND FOR THE VIC-20

Vixen RAM Cartridge
Switchable between 16K or 8K -

3K.

Gives you the option of full 16< RAM or 8K and 3K
RAM in one pacoge. When added to a standard
VIC-20 gives 16384 bytes of extra memory in
memory blocks 1 and 2 or 3092 bytes of extra
memory into the 3K memory block AND 8192 bytes
of extra memory switchable between memory
blocks 1 and 3

• Fully compatible with available
motherboards/ modules.

• Simply plugs iito the rear expansion port of
computer.

• No re-addressing of existing BASIC programs
needed.

Only £34.95

m

v.' Kl> Arm. to

€. \t 1 MS

XH

141 \BHK\ KO\l>. B\SIM;VIOkK. H-WIS.TKL: 025h H\h',\

Please send me: —

Joystick interface C Name. . .

Spectrum upgrade IJ u

Vixen Kan LI A,:idress -

Catalogue D

enclose £.

92 YOUR COMPUTER, APRIL 1 384

Listing 2.

120
1 30

NEXT

STOP

23 PRINT

"INPUT START ADDRESS

IN

HEX "

» 135

PRINT "PRESS ANY KEY"

30 PRINT

,, (PRECEDED by A HASH

CHARACTER) "

140

FOR M =S TD *1AO0 KTFP 10

40 INPUT

S

150

PRINT HEX*<N> ; " -- ";

50 PRINT

"READ OR WRITE (R/W) '

•

160

FOR B=0 TO 9

60 INPUT

A$

170

PRINT HEX* ( PEEK <N+B) > ; " ":

70 IF Af

- "R" THEN GOTO 135

175

X*=KEY*:IF X* = "" THEN 175

q;> for h*

«8 TO #JAOO

. 177

X4-=r""

90 PRINT

HEX*(N> ,

180

NEXT

100 INPUT I

190

PRINT

110 POKE

N,I

200

NEXT

{continue! from page 91)
will also lose a ship if your vertical sp:ed is
too high when you land or if the mothership
reaches the a;id clouds before ycu land.

The controls are: cursor up — thrust up;
cursor Iftfr — rhrisr left; cursor riewn — -hrtist
right; n — pause on; s — pause off.

To enter the program you must first type in
the ir.acl'.ine code by running tlie short
prcgram in listir.g 2, Should you wish to save
rhe marhne rndc on rap** fir any •im> y>u
should type:

CSAVE "MO" . A&1000 : EilAOO
IKtIUHNI
ant then :ype:

CLOAD "MC", AifelOOO, E fclAOO
IRETURNI

when you wisi to continue. When you have

in) I tired all the machine code tvpc

NEW [RETURN j
and [hen enter the Basic pro grim n listing 1,

You can run the program

Then type:

DOKE fc9C. £1A00 IRETURNI
CK£VF "I ANDFR", AUTO [RFTI IRM
Ycu should then be tbte to run Chs
program. Should you ever need t.i presj th;
reset button in the mettle of a game, type:
POKE £87,0 IRETURNI

immediately afterwards.

If you wish to mfke landings easier or
harder then tvpe:

POKE *1SBc. XIRETLRM
where X is n number from to 255. A vilue of
255 will make landing nlmoa: impossible iind
will make it very easy.

If you wish to change die number of ships
then change linj 215 to:

POKE fc59, No. of ships : POKE
fcBFDI, 48 + No. of ships
and type:

POKE &115E, No. of ships
the number ot ships must be between 1 and
9.

Machine code dumo.

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YOUR COMPUTER. AP3L 1 984 93

I.ASt-:.«-l)ri ; .i. isa twoglayer jarne for the ZX-
81 vv.tcrc each plyyci is m control of a V-
shaped bank- riiaeliitu which he must use 10
collccl guld iii llic playing area. If a player is
slim »11 Ills esd J is lei'l where lie w;i-; sHol and

lie is sen: ix.ck to his joiner. The game e:ids
when the line runs out and llic winner is tli'C
phiycr with the niosi ttold. Control* ate with
the instructions prirtcd before he game

l'oL'iit.*i the :;anie u>u first need to enter a
Rctji 1 100 characters Ion* to hold the
machine code. To enter this Rem first enier:

1 =!EM wi1h94 , s
Then usitiii the ed.t alter the line numbtti so
that iitics I to I 1 are all Reins with 91 OV

;

s

Then inter*

12 REM

, When a'.l these Rem's have been

• entered tvpc:

"POKE 16514.116
POKE 16515.118
PO:<E'16510jO

PCKE 16511,78

PO<E 16512,4
You have now entered the Rem. Next enter
listing 1 and type Klin. Type in the address
where yon arc geing to put the machine coce.
Th .n will he lnSI4 unless you have already
entered part of the hex. The address is then
the first column in the hex dump. E.iter ea;h
ol the lines i.i the hexadecinul cuir.p except
for the. address in the first column but include
ihc number at the end of each line as this u n
check.

I," the message Error please re-enter appears
type iv. the line a^ain as you must have made a
typing error. You do riot have to enter all the

machine code in one go hut vrhrn ymi rcxlarl
the heK loader remember the address w.ll r.ot
be 16514. When all the he.x has heen entered
saw the program on tape and enter:

RAND U3R 7527

This k \c iherk rhat the f.ame worts. If the

game fails to work chuck the machine code

hy:

RUN 10C0

As sn initial cheek you can just check the
final lumbers of each lines. Correct any
wrong lines by entering Run and the correct
address. When ihe machine cod; is working
delete all oflisting l except line and enter
listing 2. When all of this has been entered
type Run 1000 lo save and run the program.

&i

N<

n '&

i

ftavld, Ives throws
down, t fie. gauntlet —
it's lasers at dawn in
this frght to ihe
deatffontheZX-81.

Hex dump

:552a i.=Fc-' ? -rE'?CDO-oc,2£oaei

165*.* 47G23S628 368823 18PB9C

lesst FiecD5B3iA03HeFA£573F
.L65S4. 576^33650^ Ji36 jeaPE63F
:*£? + ~ZC2^:CZ-lL-i<?23*CCO~2C
16-?S4 304o6JS180S5S002j131C
16594 Se336*e230DS0M36?&2O
16604 JOeS»36S833iaF83676;9
ico.i i£fi3E»e , 35O0EO5S3C4.flIr
ieePl 2FE3C2c3rFC-Cofi^F = Co^e
i£S?4 ?404C2^3*»Odt)i: = 751£?r.
Jr"5i.4 -3C4Cit3cJ-C;5Cu'E s *e i ?' ? ;
355-54 54840C04S2881SCC84&3O
1SSS4 5Cljr£fe0^3i*0«OS'5CD;5
25674 7fifl3E218f4e37;55rA533
15634 34£2fl3C4(J0S2£:C437£=£
166*34 9P9&32SFElE23£5Fee*2 3

i57«4. e*e4F£9?20O5-C'CsictFerc)

-o7ii I FFP:~?OOB3e3Ccfi4^4.0i3

16724 2£2444£tl3092PiCA0S7EC>

167-34 9*eg22Cd.flCB3fiCCr&CB»3

i6T4,i 4^ECJ?:^4ij40-6te.3i;4:?f?

':675J ?2Q3C <0- j'l il OCSSP-lSs-C

157SA 63B7J=i:3£-lSC4ee7355Fi,6

15774 7234££A414S36eO0'f'7EFe

75 3

IC^F

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10

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30

INPUT P5

40

TF P^ f1 s f :• l'S"R| pi i'4.1

THEN

GOTO

15S

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• S0

LET T =0

mjh B'— i ro 10

,-" 10

jg ;">

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R=$ (2 3

-476

.—.--i.

:—. t — . : - : — .-— . : ;

:Z" *L*

f~" " W : "- S— "T"? _: ! }

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1 10

LET P=P-1

123

l_ET P$=A*C3 ~0 '?

139

NEXT B

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140

4r i ■; >UHL H$ ! HpN iiU 1 L

1 60

• —??>

fiSf"! iT":~i ; ^31

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RE -EN

. — j_

_ _ _ _ » _

J_ rS

l?U i u i.t !

9SS

REfi **CHE3K PROGRhM*^

1000

KHlNi j: ^-^1; hrK -TQwT fi"H

P? F :— : : = : : =

1B1B

INPUT B

3. 020

FOR R=5 T3 1 7 514 STEP

10

_L w ■»• b3

1S50

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lSt?3

^OP 3=0 T3 9

167S

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_t .-=. .— ; : --t

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109S

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16 J ; j

CHHs

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.t .■: .-T^ .•».

NEXT 5

1110

■— , j— • — - j <^— mm ■> , ——

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■

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. s> f v t-hi:'ti H J»i?r3 J r i- r^ ■ *_r=. ; r*.

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"orZX31

SPECTRUM

BBC

TRS80
APPLE
NASCOM
VIOPET/64
i h lease state)

NEW!

EXCLUSIVE!

Every computer needs

CHATTERBOX II

Lis.en creep. I am the leader '

1

TAKE US TO

iff,

. S*€€CM

PITCH
CONTROL

-\M

CHA I PER BOX II can say anything!
Genuine phoneme synthesis - not just recorded
speech - hence unlimited vonab.ilary
Programmaole pilch for more natural intonation
(exclusive to Wm Stuar Systems)- solid :one
cabinet for quality bound -Integral beep- music
amplifier. PLUS expansion socket for BIG EARS
voice recognition system Full instructions
technical notes and software supplied wi:h this
outstanding edjcaticnal unit.
DEALER ENQUIRIES YVELCOMb

As seen wn BBC TV "Computer Programne"

#BIG EA RS* ■.... %& &

SPEECH
INPUT
FOR ANY
COMPUTER

Hugeiy successful Speecr Hegmiion System
compete with microphone, software and lull
instrjctions

QUILT TESTED & GUARANTEED

PLEASE STATE COMPUTER: U<1 C1 ,
SPECTRUM, ATOM, NASCOM2. Vk 20, Micron.
2X80.81, PET. TRS80. MZ80K. APPLE II, BBC VHCRO

ONLY £49

ZX81 /SPECTRUM

NEW!

VIBRATO
CONTROL

MUSIC SYNTHESISER (Stereo) ,

4 1 6 LINE CON I HOL PORT

Play 3-part muse, sound ellects, druns etc. Full
control of attack. d«:ay and frequency.
Input'Outpu: lines provde control andmcnitcr
facility for Home Security. Robot Control. Model
Railway 9tc. etc Works with ot without 1 eK FAM.

Full hstrjctions'softwa r e included. am&7in~ vm iif

Add keyboard to make a live perto-mance at nwi v

polyphonic synthesiscrl r*4r\ Jr?

Note up to 3 units can be used simultaneously: £' 9-50 (KIT)
giving 9 muac channels & 48 1.0 lires E25.50 (BUILT)

THE COMPOSER

Synthe&iser M uftw

Progrimrre

Enter & aiay 'i pari kairnony.

trteluces oemonsl'aiioM.^

iSpectfumZXeitroMJimiendeil l7

ZX ARP/DRUMSEO

Fascinalins syrlnesisef
demois'ralioni Ge^rales
aulorralic sequences and

pays 'rom keytooic . Don©

woifd effects (Soecl'um)

TALKING HANGMAN

For CiatHraon'

Tnocassicgane
c airts US uclirrs
win a dry "aca

arrcinpn«ir , *?r.l iSivclruni £6

CHROMACOOE???'???

Can you deluse the bomb by
ciack'ig M secret
oomonahcr be : Dre I roe uns
uM7 with cnansroo< voce
oulpul (Spectrum! £6

COLOUR MODULATOR *,t£16

RGB h, PALUHF out (not or 2X) BUILT £22

Please add VAT at 1 1>% o p'tces. I All enquiries

Barclay-Access otdeis accepted by telephone S A. E. please

WILLIAM
STUART

DYGTZMS Led

Qua'ley Dowi Hou&e
CholiJctlon
'Jr. Salisbury
Wiltshire. SP4 0DZ
Tel: u»8 ut>4 aab

VIS*

80-COLUMN/GRAFICCARD

■— • Distal clock

Mnposslbllty ol 90-colunn screer will Hires
C8MC-screen (also n colouii

Graf ie iidures: ■:nn te suilchod to jackground

Upper line can bo Itckecffor corrments etc.)

A^>il»Lilu lin=nLj.i:.lii(j ur greater clarity 3n
to.<( screens

FREE ADDED): Sophisticated VrordcrocMtor
•villi e»i«nc«t rnanuil

mm

».\ *j

* Warnlig: Beware ol

iinforurHni1.il on-.
Ol ZERO-poducts!

,£ufy&i$m& gcdfofHs forVIC20 and CBM64

EXPANSION

UNIT

!Usr2fiil EPROMCARD,

t two :k>««FPRCM Mike:!. ,,

/JjrsaaifS aio c *iahqca3e.

£ 5.95

• 40/80 COLUVIN CARD Ma?A • EPROM =>ROGRAMMFR U

I m^OU VIC 2C'ii lunp-olrsr.lon.-.'i-niroulef^* "J Mr J716, !732 UM. imi.VXZ EPRQMfi'"

, ln<t f £ 55.9E ^ ; ,

^^r>i-

M ■- - 1" piOloM. *'f- it oil 'AV.hotit ntllgal

• 64 k RAVI- 2kEPROM?£ 55 ,95

hKlsollntlgtuilAM I'lrr. Fasily:nire:h-il. ?. w '

Cjnt^«**ilrcjniecl«ltnyojro<yipu".(!i > £ 31
ilo aaflwa-c ir FPae-vi C6 50 ^21.

EPROMERASER^

I aaw,l EPROMS % ■< J!ancji.v.y J

H EXPANSION UNIT .-r^^in,
r**>^^Sifii

Willi >KUlr fuHyN.lltmC. ■ " ,3, S5T;£^~»)!

aoitwi IVGAMIccik'astol;, , "SL . -i3,v'

nrtnntoeicp3\>«jJKiiy L^StJeS^*

VIC 20 e 2035 * CBMG4 s x.b:

• MACH3

PRINTER BUFFERI

15k 311 46k

Fa-marpncuMC Dctlui inquiries lnvltc-d.4l

All pfjcBsexciude VAT. Shi pping coats E 1.50

Supplier :o schools, urivcrsitiBt anc
jovernment cteparmenls. :

• Wc have good documentation of all our
products, freeof cwg:.

• All |.iiiii(irriHnl ran h*. tiled ^Ut v.'ithCut

,m* obligation: if returned undimajed within
CI Cr IRIIMI V 'Odtys. you only pay posla>;oard packing

149 KING6TREET * GT.YAnMOUTll NR30 2PA - TEL:(0493)-20i3

fJASH HOUSE)

ORIC SOFTWARE

THE SINGLE SOURCE SUPPLY

FOR ALL YOUR ORIC SOFTWARE

PERIPHERALS AND BOOKS

Catalogue with every purchase
or send £1.00 which will be
deducted from your first order.

SOME OP THE TITLES WE HA VE AVAil A3LE:

Airlnr*
rjloyihms

Bresknu: - >D mat
CotJv Fobs *

H=nai liin
Chess "
Cute Cii/y
UaJbi
Digger
Dinlv Kari||
Farvasy Skich

r :| I

For^

Frankllrn Tomb
Grsl

' I.T i.r-., Al|«Vt

Hohbii
Invaders
Jogger
Vnria

P/uliigamts

•WK

?.3b

Ifi.iHK

SM

48K

7.50

4«K

7.50

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48K

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7.95

4HK

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•3HK

6.95

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3 95

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ic.flj.s

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1HK

19.95

16 AJK

;.50

48K

(■.95

48 K

e.95

16 UK

'.9-3

;>|ii;r inor Oreiilif

:Jii,: I-rl
*1'i«;r.iopa

■v ■-..■

Synthcsiiet
,V:ir!l "rocesso.-
K,-,-:,- I

?iKli;r; Advenlure
?nri)ons Rever.ge

'9*.

iSK

■«K

t D5
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6.50
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i ? o*:
eco
9 9G
a 59

BOOKS
"he Or c I ;>nd hoy. in eel ;tf. -nest Irom
i: 95

"heO-icl Companion 6 95

An uurodiiction to f reclaim; nn; ihe Oric

F*OMag«

Booki 5Qy for I 7hp pc book

neieatier

Cassetur 50d tor ? to 7 ftfriiil tt or ovm

Oric Software, 118 Worcester Road,

Malvern, Worcs. WR14 1SS.

Tele Malvern (06845) 62467

1

«

si
o

IT

D
t<

S

10"
10!

to:

i

th

c
c

m

96 YOUR COMPUTER, APRIL 1 384

ANOTHER PUZZLE
FROM IMAGINE

MOLAR MAUL

(Any Spectrum)

A totally new experience;
an oral extravaganza!

BEWITCHED

(V1C-20)

This game
makes Hampton
, Court looka
doddle!

PEDRO

(4flK SpBclmm. Dragm, RRC Mnrifil R.
Electnn & Commodore 64)

You'll get no siesta

when you meet this mad

Mexican gardener!

JUMPING JACK

(Any Spectrum)

20 levels of crazy, zany
fun.

ARCADIA

(AnySpectrum, any V10-20.
& Commodore 64)

Discover Britain's

best selling

computer game

for yourself.

Ah

Diddums

(Any Spectrum)

Be prepared for

some sleepless nights

with this best

seller.

ALCHEMIST

(4£K Spectrum)

Can you discover the
"Spell of Destruction?"

STONKERS

(48KSDecfrum)

Poised on the very

brink of battle, every

decision is yours!

ZIP
ZAP

(48K Spectrum)

Heart stopping

tension -

supersmooth

animation

ZZOOM

(48K Spectrum)

Don't iust play your
Spectrum... fly it!

LEGGIT

(Dragon & Atari)

Leap your way

through hazard

filled screens.

WINNER

of the
;VG GOLDEN JOYSTICK AWARD

1983

WACKY
WAITERS

(VIC-2D)

Take a tip from us, if you
want to stay sane, work
at a different hotel!

Sharon O'Brien will welcome any U.K. or foreign dealer enquiries at-

Imagine Software Ltd.

'Imagine House' , 5 Sir Thomas Street,
Liverpool LI 6BW.
Tel: 051-235 8100 (20 lines)
Telex: 6285B6 Garnes-G

..the name
of the game

A

SATELIJTHS, lasers and microelectronics
have made big changes to t'at work of
surveyors and map makers. Measurement of
the rate at which glaciers flow and the
movement of t.ie Antarctic ice have been
largeh eliminated by serial I.undsat photo-
graphs. Hcwever, for some jobs the
traditional methods of che surveyor art sill
the b;st way to approach the problem,
Although it is used less in this country than in
North America and im ihc Continent, the
plane tabic is a rigged and effective surveying
insrumcrt.

Rathbone, a 16th Century English
surveyor, said that the plane table was "A
mosc excellent and absolute instrument for
this o.ir purpose in survey." 't was used
extensively by the- Britis! in the Survey of
India and has the advantage over other survey-
ing methods that the plan is produced directly
tin complicatcc recording of ;i nuhitudc
of angles anc less chance of missing- our an
important deiail.

A flat piece of wood

A plane table consist: simply i>~a flat piece
of wood, usually tbottt 20 inches scuare,
mounted on to a tripod to bring it uji to a
convenient r.eight for the observer. Tic
tripod should have *n adjustable head so that

the lahlc cm be levelled. A jlieei of paper is
rlippec. to the top surface oft:ic table and an
instrument callec un alidade is also necessary.
An alidade is simple a ruler with a straight
edge and a s ght at each end which can be
incd up withdjsiaii. uLijccis that vol Wish to
nal.e on your map.

Figure 1 shows the principle of jlabe
tabling. You must c.ioose a btscl.nc for your
survey with an observation point .u each end.
if you want >oui map iu htve i defined scale, -
;'oi .example oic inch or. th; map to represent
100 vards — a scale of 1 in 3600, the two
points must be a &mnvn distance apart, fcither
you know his in advance or it tan be measured
usii.K a kmg tape measure. Surveyors use steel
link chains that are 20 or '■() neties .ong.

Standing at one obscrvat on point, you put
the alidade on to the pap.-r fastened id the
9— r

5» ~9 — " P
Belcw. Figure 2

John Dawson explains a
BBC program to
simulate plane tabling, a
surveying method, to
produce maps &nd"
plans.

i

MAP

Figure 1

p'arw table and place the edge of ne mler so

tr.at it" runs through the observation p^in:
rr.arked -on the piper. The alidade .s then
lined up'" with an object that you want to
record on ihe mac; you draw a lin? from the
observation, point to the edge of the paper,
and record •• what I he bearing ii to. For
example, you can write "drirch" or "end of
fence" on the margin of the paper, or simply
give the bearing a number and keep a separate
rccorl-itt- a.notibook.

Th* lirsl Writ* of the procc33 ii now

complete. The alidade is tuinec until it h ifi

line with each* of the c.istant objects and more

lines are drawn from the cbservilibr point

.-iinark to theedgc of the pspjei. Wove thi plane

. tabic to the second observation point and

• - «**

i.

mm

1

WM* : *-

'■

repeat the process for :he same objects; The
plamn where thr vaiu'us liu;» ci oi.s on • the
piece ol paper mirk the position of the
object!. You can see immediately inn the
scale cf the mup is set by the lcne:h of the
baseline on your piece of papst. j.

I ' -A-.i. KiM-!nn- i-- Mu,:, :'..-. disun.i utjjccrs
will be closer together and the scale of the
ma.) is smaller, lor example I inch to the mile
— in 63360. A furher obset .lii ion foint can
be eruuen and maik.-d by angles, :rorn ttic two
ui;i..Kil '.one sin join n id ilie process. cm be
continued using one of the b:igitial base
stations and the new point. In this way t.ie:
survey can be extended :k )'t as you/ wish, '
.over hills am. through ifiitage* or towns.

Plane tabling problems

1 he problems wi;h plane .tabl.ng arc that
:he scale efiheinsp is fixed forever otice.it is .
•j -iorhmi-'tec to paperiindi-Work- is very di f~iet.lt
n i persistent I v wet or -windy c limine

An alternative method of survcyins \vhicli is; ■
jsed wide v in die United Kingdom cqiwists
of measuring a number of distance? and-
angles, and then cousin c*"rihg the plan or map
in the lelaiivi-comlbii ofihe surveyor's, office
Theodolites are normal y esec fo- nieasMriag
horizontal and vertical armies' but the rwo *"
instruments shown h fiju'r;s 2 iind 3 car give
useful results.

If yea a.e goius u lecord the dati fnm a
survey rather than plot inr. it on to paper il ■
the time, Vo'ti will need some way of
nieasunngihe-posiiion of objeeis jo that their
positions can be modelled in jour computer.
N\niuaily thh> is done by measuring the angle
botJKecii ran objects,, cne of Which is \ff£l
known positidn. An alte : naive mcihcd which
is used for quick reconnaisancc- sketching
makes use of a prismatic compass — figure 2

Sfl YOUR COMPUTER. APRIL 1984

— to measure the allele between the object
and .Magnet. c North'. 1

The- prismatic conipas-i i.\ strongly made .
arid cab prccluoe readings, accurate to abrrut
plus, or minus half a degree, 'the triangular ,

pilsnii ..I ilk il'.i: f'f.'l'Kc lAHiipuSS reflects the ,
linage o> ; the edge of f lie amps< card just
below the bicksigfe When the observ
'.Irouih the backsi.du n i; possble to Thfe up
•h: hairline on the front jlass with an object
iirjd cake a reading of he becring at th-sanie

I'tic sextant shewn in Sgcrt: % is intended
\.se at ses and is actually made oi
.jrbmta:c plastic. This ■ - naten;.l changes
Hi shapi less ll.ati brass whe!i--;l'i6 ;au - ;
teinpercmtre varies The vuniet stale on iftc;
circular dvu:n allows a user to take rea'dni's
jj'cjuwiti 10 O.'J minutes, A minute is I ;50 of a
degree: I K

[ c'yij toaueyifcitlicji j)it F.j'Suji MX80 FT pi
an One MCP -10 printer to my HBC micro-
computer. I $itjj> n high resohtion dump from
thi- screen to the Epson primer or using the
..excellent pfoU'.ng commands' in the Oric
primer I fiHJught ii slicuk be possible Hi
combine the computer w.th a prismatic
compass or ■<: sextant to prodecji .naps'. or plans:
like. t'Spse from' a plane tabic. The advantage
would ..b; that ihcy couid r>e: plouec auto-'
uittliUlUy mid SUtled elevtHiuieu!!'. .

Above; Figure 3. ......

From two observation po tits it is possble :o
fine the height ind dt-.iar.ee of a far poirr.
Figure 1 shows the simplest uraigcnient if
ingles to line the distdtfee of a point from a
line extended through" the baseline. Fur the
moment 1 have assumed that the baseline rtrhs
in 3 North/Soul. i direction. I he baseline is
represented be the line A-B hi theiigjie. The
formula or algorithm fir finding ifi^ distance
ilong tiie .ine running from poin: 1$ to poirit

C is:

D-C ABSm :i80-bi . Sin a

Sin d H"

The angles ins.de a triangle must add up to
180 degrees so argle d can be found by adding
angle a and angle I8D-b togcth.T and subtract-
ing the result from ISO. I have subtracted b
Tram I80,degree> in th» fcrm.tla because the
bearing that you measure originally is the
acute angle C'BD.

The distance O-B can be found r.sing the
1 formula - ■■

" "i\jtou*have these two resjlts ii is in"
to "p>ot :he position of the object
rt»$ distance U-C'tp the .baseline' A- \

CB

d •:

Toir(b)

R and using that as the Y thVordmale, with D-
C. ns rhe X co-ordinare ..in n HRC, mbrn-
cemputer Move instructirjn.

Th; program consists uf the following
"scftiensiggvi ';': . .■:■;■:■'■■ ■' '"

Lines 50-81) "til the two dinunsional aira
IvYrh rinmh'y values ..tiff stop rht?....prrt£miT
lu-vimj to alkuau more space while il
running.. 0KS$ \yiJl : be used. to hold a series ■
hearings' from two observation points wiih*?
shut description of" the otjec:. Remember
that the statement DIM OBS$(2 :> 5')) actually
sets jside memory for an array thret items
wide and 5. items deep as both - cimensions
> : i r T fropi. zero in BH 1 .". Kasic.

Establishes text window

Lhie. .70 establishes a .text window m the
b.itt cm' three lines of tile screen at.d Lite ISO
sets the graphics origin to the left li.ind . di'.c
o'thj screen and ust ahoye the text wincovf;
The latJcst vertical m Y value that can be
displayed oi the screen is n:>w 1024-GiH).
'^:i:ines,7'JU-850 are the definition of the
iuiiiiiljsijiicm procedure. Fhe Repeat. .Until
loop cottirues ttitil yc.u have 'entered the
co-ordinates for all :he, -observation points,
The purpose i\' line'/JjiHs to prevent a line
bjit'.K drawu lioin somewhere oil the screen to

the tir.sr haye. A Tilt y'M have Lrilcrcd the Fust

base, the subsequent '$$£s, are linked by lines
f§00lnd813,

Line 300 sets a flat 1 to' & known stat: ai the
sfifrfof he loop befbfl^W character typed in

by the user is cheek>jpd.' and acted upon.

PRCGanglc, lines 33W45P, e.cher craws a

new beating on tile .s:t:e,cn } or ;lcars;..aji
existing beirittg djpe:idi:ig tin the'staic ol llu -
gla. PROCclear', lines 95D-980, sen the flag to

the opposite Male arul then eallsT'ROt ->uigL
lit unploi a beating by. p'.Otr.ng ii .again iii-ili;
current background' colon 'rj line 450.'

1 will sho\V 1k><v fjie . jiu t pu t. . fru^L-t^e
progr-atr.^can b» plotted next month usin[_' the
Ork foc.r colour plotxriprinier.

j

10 RO-i MAP PLOI'TiNG PROGRAM •
20 -£b S1 : ART£D 29 Jh-IU.'iRV L?8ys

3 i . JJA$»: NOy, = ' ! »^W :;

I '-i

■7. - 2s is - '- ■■-■■ : '-

to j.ii-l rjBSa(2.50)i DIM BASE»2.10"

I V, frjj

| 'j..- xt-.lrv ■} "HOPli ? I-M

!iJ L>S1 IH"

ty'j roR u to o pc ::■:■

t : ; . . »f.i- v "Rl 'H !M"

r>;i CiBS*< I ■. 1 Z\ ";M *■*•(•>■ •"
SO i - F^ lit : *v.Y.- 1

170 ' djj 2S»0« :- . '-"■' , ': n

100 • '■■■* Oi KQI? ■■-■■ OS YOR ■■ Os

D

00!

BASE

i;;i" '•t>:.i ::'.. ;:':::-:•:

fiisTing continued on next page)

YOUR COMPUTER, A^RIl 1984 33

(listing conthutd fium (/rvvitus pu<;e)

EWDPRQC

1

560

200 l.-«i i - i • . .-. I .

!|

5 '.:■ •■

DF.F PROI ■■ OCY)

2 !

600

F* ~ 8TR*<8ASEN0K;

.:..<■ REPEAT

610

' OF - ; Xs Y3R *

230 GLS

620

HOVE <0R-8*Y0R

:.-j r>.R'rhrr 'Carrwt tia

!S«r '■ ; WiitMU'.z '' at

"jBASECG

DRAW KOF+8, VOR

,BA IEN 'I - -- "> T . jBABg 1 . BASS M)5i»

640

Wd\.K :<0R,YPR+8

F'RIMI "Input <A>nele <G>«i»i? -:)■:< ige

»P>rint --■

630

j> :,-,h :t-i«. .■ K : :-i

: ! -■• ii * i , ?J ear t>e>i?.r j nej ;

660

VIOKS *OR-<!0,YOR+50

.-,- ■

670

vdu ?;

REF-tAl

680

PRINT S3

K» ■ INKEYfUOG

690

''DO 4

290 until .;•

■

MOVE :<DR,YDR

' - <■ '■: ■ i Al Sfi

to

ENDPROC

■ o if .•;* "A" i :>\

' ;:..:.-■:,•.'• I s

' 20

" i IF ? 'C* fHEM

r .': i egr

V

BE " PilOCjm i'i -I i at

- : ' !" f.=. ■»" rHEN

!' ? : O'.'r ----- •' !. '.

74n

RI S=

;ip j, .-, -I-" tHEN

I -iQCpr rrt

750

INPUT "h:.iW IUMy' iJ.S'rit-IfS

"' BASESK

To-".- UNT.ri r?

760

REPEAT

360 ens

/ 70

PHOCc-rn

570

760

BASE(0,B&8EN0X) - •:

BASE* ,»ASt «07.> - V

•■: . >

7<?0

rr BASE*'/ - I TI-EN

:::..■.'

390 DEF PROCairi}l«

II .

MOVE &A6I -■■, K5EI : KS

> ,OA0l • 1 i'lM.w 155 .1 )

400 a ■

BIO

i. •.■; . •,-, - . ■'. , -■.(i<M[\/-Q7. ■

-■ r -;i- (J ,BA3f HCWiJ

110 1 JFI.JT "Jnpjt angle

erf bear a kit "<^

820

BASENC. «= >''-■ I0%+-1

420 V » D*CO£»<RAIXft> !

, ..,

EASEE^ -- f-:.',v--:>.--

i so ■' -■ 0*8IN< ?A0'A) %

a <!o

IJN1 : BftSEET! ■

an-:- tF GF FALSE rHEM

H70 .- " ■

age

BA^NO?, ■• BASENDX-J

450 w ri' '■ .; ., v

»ao

EMCPRC

460 M'irn qgo

FJ •'«.•

470 P. IT t, ;•.. V

880

Ptl!" F^'.ii.b;". ■:•:.! U-. g«

480 Ft-01 1 "■!•■■ vr«

0*70

CC3

490 EMCPROC

90 >

I iriM -my,., i....... M,.- er to move 1

.„

910

( ^ iy^sp (0>BfiSENa%i r •

- BAiiiz; 'i , :-jo.5En::»: •

5iO &EF PROCorn

920

HOVE ■ . <■■ Of* - ■< : Y3R

;-.- v

! ; . -"'-.■■ CLS

-' 30

-;inri--ii

-, \> pprhn "Input X and

Y t:Dc»rr;i na tea For

[ , ,-, i=. ,--• "i.ivjl;

943

.•a,- ■ • BflSEWOK ,

950

l)C PROCi: 1 ear

540 INPUT "X: "X

960

::r - 'Ri :

550 INFUT "Ys "Y

•'•'

PROCanqla

■

SAO F-RaCcroHS! (X Y)

980

ewrr-ROC

|iiiiiiiiiiiiiiiiiiiiiii;iii!iiiiiiiiiiiiiiiiii[iiiiiiiii!iiiiiiiiiiiiiiiiiiiiiiiiiii]iiifliiiiiiiiiiii§

We will not be beaten on the price of S
= Star or Juki Printers.

PRINTER BARGINS

STARDP8480 C23C.OC- INC VAT

ST /VR GEMINI 10X. C2GC.0C- INC VAT

STA.RDP515 E27E.OO INC VAT

ST4R DELTA 10 ..C368.0C INC VAT

JLKI eiOO C420.0C INC VAT

t-ing for sanple Pr ntout. Full Spec and latest Pries

Securicor ddivety C8.0O

Cables for BBC/Oric.'Dracjorvfilc f 10.00

BEC Fauks available induces:
Printer Cable. Screen Cump, Softwa-e
delivery, fact sheet and VAT
£20.00 foi all abiwh! priruerE

BBC Model 8 C399.00

BBC Model B I Dl ,. C469.00

ELECTION 1199.00

Phone/Credit ca«J orders welcome

CJE MICROCOMPUTERS

Dept YC, 78 Brighton Rd, Worthing,

West Sussex.

[0903) 213900

Zi\

GET IT ALL TOGETHER WITH
MICRO BUREAU

ALWAYS NEAT & TIDY A

BIG STORAGE AREA *

COMFORTABLE TO USE *

SPACE SAVING*

-SLIDING SHELF

Roomv entugh for vour Computer TV/
Monitor, Cassette tecoider/Oisk drive
plus Maga?in-)S, Book aid I.^.-i.-.,
this fin to assemble kit in rich
mahocany venesr give? yoi that well
organised T-rlir-i;

Please allow2i dayi for delivery ONLY £39.95 - £4.95 P & P

Plaase send rrw a Micro Bureau for my hnicfo}.

I enclose a chsque'P.D. for £4-1 9D { ncli sivel.

Name

Address

Piw Code..

Send to:
Merc Bureau, 52 Brown Avenue Church Lawton, Cheshire ST7 3EP

(crsend S.A E forfurtier hforrnationl.

100 YOUR COMPJTffi, APRIL 19B4

For home or business the
IBM compatible i

Advance)

16 Bit Micro-Computer

Under £350"

For {he home user start with Model A
wilti its native 144KRAM, 64KROM and
outstanding typewriter style keyboard thet
fits within the base unit for portability and storage.
Note the large retu m key and position of the nurr eric keyboard . Fast retrieval f 'om
storage and fast action or ganes is achieved by the use ol the Intel £086 16 bit
micro-processor unning at 4,77 MHz.
The Advance 86A uns IFJVI PC software.
Specification

16-bit 8036 runnng at 4.77 MHz.

128K or 255K with parity' plus 16K video

54K.

Diagnostics, Base. Cassette 0. : S

Basic

Full f.4 keys lactile

10 piogrammabb keys

256 in ROM

TV. RGB Coup/Sync colour or rnonochiom j monitor

Full screen handling. 4 s;reen pjged

£0 x25]r4Dx25

220 t 2C0 or 640 x 200

16

Scroll, reverse image

Audi)

Cassette por, light pen, joystick Centroiics

Built-in spea<er

Built-in ROM

Any usinj Centronics pa'alle interface

Hardware and software compatible with BM PC User-upgradeatle

\~> M^del B Provision far 8087 Arithmetic Processor

CPU Type
RAN

ROM

ROM Contents

Languages Irduted
Type of Keyboard
Keyjoard Facilities
Character Set
Metiod of D splay
Display Facilities
Text

Graphics Resolution
Colours Available
Graphics Facilities
Cassette Recorder
Interfaces Included
Sound

Operating System
Prinlers
Coivnienls

The business user can upgrade b Model B by adding
the Advance Expansion box containing 2 x 5,25" disc
drives providing 720 K storage at £902.13.
The Advance £6 IVodel B offers the business micro-
computer buy?r an IBM compatible disk-based
systerr wilh twin drives, with Peifec writer, Gale. Filer
and Speller software iMS/DOS) or only £1250 plus
VAT & Delivery.

Advance 85 Models A & B art designed and ma'keted
by Advance Technology UK Ltd.
12E-Kexpaisioii£:i25 + WT

Deliveiy within 30 days fiom i eceiptof paynen;.

'Ex VAT.

Advance Technology UK Ltd.

8A Hornsey Street, London N7 8HB

01-609 OOBI

ToAriv?nraTf»nhnnlnryllKI-rl 1 .8AHoms^S r reet, I nnrinn W7 flHR

d Please send Model 86A, Vticro-CorTiputer & Keybcard I enclose £404.99 including VAT & Delivery.

□ Please send IVodel 86B which includes Model 36Aplis Expansicn Box & Software. I enclcse £1250 plus £187.50 VAT plus £10 Delivery

c 128K expansion £125+ VAT eheque 1 ; 6ardaycard ; Access: Nc

YC

Name.

Address

Company.
Address

roLR coM'UTen, april i 984

101

in addition to offering computers and
peripherals at low lowprices, Vision
Store now offer Interest Free Credit i.e.
paying over 6 or 9 months with no
interest charge. To take advantage of
our Interest Free Credit Scheme come
to one of our stores where our friendly
staff will help you complete the form.
Then subject to status, after paying the
deposit you can take the goods away
with you. irs as simple as tnatl

COMPUTERS

COMMODORE

Prke I Deposit i Payments

CBM 64 with FREE Software

€199.95

liter?. 1 ; i t-rce

Deposit £ 1 9.95+ 6 ironlnly \ - x — —

payment; of 130,00 *^

CDM &4 wirh C2N

Cassette
CEM Ii41 3isk Drive

mc £105 worth

software
CBM fill Hot Matrix

Printer
C8M 1 526 Letter

qual.tydotprrnte-
CBM 1701 Zolour

Monitor

£249.95

£33.95

£219.95

£27.95

£225.95

£30.95

£339.95

£39.95

£229.95

£31.95

6x £36.00

6x £32.00
6x £32.50
6xf 50.00
6x£33,0O

SX64 Porta Me Ccniputer
including Dis* Drive aid
Colojr Monitor pus
£21C of FREE Software

£895.90

Interest Tree

ueposit tav.iv + v rrontniy

cayrrents of £89.59

VIC 20 PACKAGE inc
VIC?.0C2N
Cassette Joystick
5 Game Cassette
Game Gt rtndge
Usurl Price £169.95

ATARI

£149.95

£17.95

6x£?2fJ0

Atari 8C0XL 61 It computer
with FRFF So tware

£249.99

/merest free

Deposit E33.99 + 6 monthly

Eayrrenc of I.36.0Q

60DXL.vitMOlO
Cassette Deck

80oxi .viri- in in

Cassette Deck
800X1 with 1050
disk drive

ICoQUik'-Jr.'C

1 020 Coloer printer/

plotcr
1027 Letter quality

printer

£209.90

£23.90

f.299.90

£25.90

£549.90

£57.90
£j5.90

£199.90

£19.90

£299.90

£-5.90

6 x £3 1.00

6 x £44.00

6 x £82.00
6xf44.00

6 x £30.00

6x£44.60

DRAGON I Price I Deposit! Payments

Dragon 32 32K Coirputer
with =REE Software

£169.95

Interest Fiw»

Deposit £ 1 9.95 + 6 monthly

payments of £25.00

■

Drrgor 64
DrigorDis<Drwe
mc Controller

BBC

£224.95
£271.95

C29.95
£39.95

0x02.50
5xE4O.0O

BBC Model B + computer
cassette deck andcab*s

£439.95

Interest F^ee

Deposit £49.55 + 6 monthly

payments of £65.00

CDC B with Disk l/F
(Jus IO0K Curiam
Disk Mwe

ww;9n W95 <■* €99.00

Cumana CSIOODisk Drive

£219.95

Inrcrosr Pec

Deposit £27,55 + 6 monthly

payments, of E32.00

CL/VIAWA XZ00K

Disk Drive CS200
CUWANA 2xl0DK

Disk >ive CD20C
CUWANA 2x200K

Disk 3riv* CD40C
CUVtANA 2x400K

Disk 3rive CD80C

£255.95

£399.95
£449.95
S539.95

£37.95
E39.9 1 -
£53.95
171 31

5 x £37 00
&xfnlMf)

5x£S6.0O
lx£78.CO

Microvitec Cub RGB
Colour (vtorutor
£249.95
Interest Pee

Cepc&il £33.55 + 6 monthly
payments of £30.00

□

SANY0 14" RGB

Monitor Stcf
TORCH ZflO Dn< Pack
mc C'PM Programs
Ferfect Speller
Ferfect Writer
Perfect Rer

E249.95 £33.95

£859.95 £259.95 6x£lX).C0

■5x£36XO

PRINTERS

DOT MATRIX

Epson 17X80
Dot Matrix Printer

£279.95

Interest F;ee

Uepcsrt: £39.55 +6 monthly

parents of y4onn

•as*.

EPSON FXS0
EPSON MXI GOVT
EPSON/ FX1 DO F/T

SEIKOS 4AGPI00A
StIKOSiAGPIOOVC
SEICOSHA GP250VC
itltOSHA GP/CHJA

SHNUACP80
STARDP51C

TTARnp , ;i r -

SrV« GEMINI 10X

5:43995

£49.95

£489.95

£57.95

E5 79.95

£63.9E

£199.95

£ 1 9.95

F70995

£23.95

£259.95

£37.95

£4 1 9.95

£47.95

£2/9.95

£39.95

£279.95

£39.95

£3 1 9.95

£43.9S

£795.95

£35.95

oxBS.CO

6x£72X0
6x£36X0
ox £30X0
ax £3 1. CO
6x£37X0
«x£52.C0
6x£40.C0
c.x£10.C0
ox£*6.C0
5XE14.0O

DAISY WHEEL LETTER QUALITY

I Prlrp ID*fWwftl Paymenti

Smith-Corona TPI

Daisy Wheel Printer

£259.95

Interest Free

Depoiit £37.55 + 6 monthy

payments of £37.00

Cl

JUKI 6130
BROTHER HRI 5

£439.95
£455.95

£49.95
£53.95

6x05.00

6 x £67.00

Mcmotech MT0O0O32K

Interest Free Deport £34.95 +
6 monthly payments of £40.00

£274.95

Memotech MTX5 1 2 64K

r?ia oe fniere:t Free Depoiit £44.93 +

IJ IH,y a 6 mon-Ny paynents of £4500

New Additions — Just In

LynxLaureat 128KCP/M System mc perfect
spelie-, perfect writer, perfect fi.er. perfet c<Jc
Interest Free Depoiit £99.99 +
9 monthly payments of r.99.99

£999.00

Coieco Adam Vttord Processor inc. Printer
r mjt n ac Interest Free Deposit £75.95 +
r UOV.va 6 oonthty payments \j\ 197O0

Selkoxha GP5O0A Dot Matrix Printer
r 7 ]q nc Interest Free Deposit E29.95-
x *■ ^, '• 1 '■* 6 1 im id Hy fJdyrneriD o; ESS0Q

S«lkosha GP550A Corr«poxJance qtjat.ty

Dot WatriK Printer

interest Free Deposit £43.95 +
6 monthry paymenti of £4 1 .00

£289.95

Silver Reed EXP500 Daisy Wheel Printer
c 3 aq qc Interest Free Deposit £49.95 +
latTiyj ^ monthly payment; of £ 50 DO

Cash Sales Only

Sinclair Spectrum 48K

inc. 2 Free Games Pr ogiarrs
BBC Wlcdel S

inc. ? Free Games Prograrrs
Accm Dectron
Conmodore Vic- 20

inc. 4 Ganes Cartridges (worth £39.96}
One - I inc. £100 Software FREE:
One Forth. OricSase. Oric Mon. OricFligit.
Oric Mi.nch. Super Advanced Breakojt. Muln Games I

£129.95

£399.95
£199.95

£99.95

£139.95

Done foiget-

\X* are Lonckon's largest itockist of Mtro Computer
Software. O^er ,000 programmes instock foi games,
cdijr^ttoivtliini.'ftKjsncsi Ci.4 ilri iu<jtft Uckiu» tklittlioi 0.

All our naroware ana software isavalaole lax-Fre? to
oveseas ciiitorrers, please send lor our comprehensrv?
list. Please contact our Croydon office.

Ezaag iEEi

Order Customers. Phone or write tor
details.

\X* send our wtnle rang? anywtiere n the UK by -REE
Insured Secoriccr Delivejy Pl*nse f onr.oct our Ctoydon
office.

All Prlcoc Include WAT

VISION STORE

VISIONSTORE KINGSTON V1SIONSTORE CROYDON

3 Eden Walk Precinct, Kingston, 96-98 North End, Croydon,

Surrey. Te\: 01-546 8974 Surrey. Tel: 01-681 7539

1 02 YOUR COMPUTER, APRIL 1 934

Prograrr A.

3 60 TO lO

4 CLS : CLEAR : PALSE 20: PR I
NT "Press Y to ccntinue

Any sther key to abandon"

5 POKE 23653, C

6 IF INKEY*="" IHEr. 60 TO 6

7 IF INKEY*<>"y" ThEN 6D TO 8
000

1C LCT i-p-SOOOO

11 IF rp< 30000 THEN PRINT "RP
mjst be larger than 29999"

2C INPUT "NUMBER OF PROGRAMS 1

-9 7 " i n

21 IF n<l DR n>9 THEN GO TO 20

22 LET rtop=PEEK PEEK 23732+2S
6»PEEK 23733-21*8; LET b=rtop-rp

2<5 DIM a<n)

3C FOR f = l TO r,

4C PRINT AT 19,0; BYTES LEFT="

5C PRINT AT 20, O; "PROGRAM ";*

51 RANDOM I ZE USR 35E2

55 INPUT 'Number of Bytes a-ssi
gned to program ";(f!;" ? ";
Y

60 IF y<200 THEN PRINT £0;"T00
~Ew BYTES !"i PAUSE SO: GO TO 5
3

7C LET b=b-y: IF b- «n— F )*ZO0<0
THEN PRINT £0; "Not enough room

for rest of

programs

PAU

SE TO: LET li— \j*yi 00 TO 3tj

75 PRINT AT 19,0;>/j" bvtes": R
ANDCMIZE USR 35B2: RANDOMIZE USR
3682

00 LET am=y: NEXT f

B5 LET tot =30000

8£ LET p=290DO

90 FOR f=l TD r

100 LET p=*p+12

101 POKF p~1 ,TNT (fnt-ZTSA): Pflkf
E p,25a#(tot/25fc-PEEK (p-«-l>)

11C LET tot=t3t+a<4)

120 NEXT f

125 LET p=p+12: POKE p+l.INT (r
top/256 >; POKE p,256* (rtop/256-P
EEK <p+l>)

130 POKE 291 54, r,

140 RANDOMIZE USR 29152
800C INPUT *PrDg ? 0-"; (PEEK 291
54);" ";a: POKE 23729 ,a
8010 RANDOMIZE USR 29643: BEEP O
-2,0: GO TO 8000
9?"?E 5AVE "Proa" LINE «?"?*?*? t STOP

•9991 CLEAR 28999: LOAD ""CODE i

RUN

Whin Cl.-lVE Sinclair btnuglii uut the IK
ZX-81, his first customes found great limita-
t.ons in Lis use. The unsxpanced ZX-81 had
limited memory, crude graphics and a most
sirarge display system, which varied in size.
Yd a whole host of impressive software
developed for :his computer, pushing it to its
limits ;ind fur her. Sinclair's next computet,
the Spectrum* had a far mere impresslvs
specification but n r as still lacking in compari-
son say, lu die BBC.

However, programmers nave occasionally
managed to produce excellent games lot the
Spectrum snowing up even the jrames-
tiriented machines Such as he Atari.
Adu.iutdly, ilie Speuiu.u will nevci quhe Uc
h the class of these o;hei rr.orc expensive
machines but at ieast by using clever
techniques, one can push it toward their L-ve..
I hope this routine takes die Spectrum one
sicp nearer.

This routine is written to allow the

icootinued on pogc tO&i

•OUR COMPUTER. APRIL 1 984 1 03

SIR ROM

MODEL 2

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already p ovtdod liy tht micro to allcw up
o 25GK *OiV snaco

• Fit* aasly oiMiti: HBC cas?

• Plgjic mto CPU :nii:l..:l vio srijrt flexible

correct?!.

• ■inirrvid plug dtsiyo .iIIm.m, the Mocel 2
bnnrrt m enrnert •w*"- i»oty lo iiv typo 6i
BBC CPU scntitol .vithnoharnnonictoor
board

• Boaid & held in place by Hurry

SUOJOftf.

• Full kwucttoni piovdcd.

iA0Oi:iona testum-i mcutictno itMiity id namloi panel firrrwa a iodise, and fian lo<rd
back into sioe»vav» RAM 'o- futj'O ise - gn-i'iy \r>n r-o limit to the number tf of'ective
ROMs access pie 1

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* r our o' these BOOtoU i:.iii tuipport •: ithei
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• The Mocsl 2 bciiii allo.v:; switching
between multiples of 2K. 4K. KK oi f QK
BOMflAM

■ Fully puffe-ud design.

RRC MICROCOMPUTER

BbCIVbdelB £393. OD

BBC VodelBD £469.03

DISC DRIVES

Smalt? 10CK C199.03

Donl I'JOK C349 03

Oupl4->0K £669.03

PRINTERS

Oct Milrix:

shinw* cp-so i <:o;j J^

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Simlh^oro-tO TP1 £218. /t

Juki 6100 £399.(l>}

MONITORS

Sanyo 3.'G 12" (8S.00

Micrariwc 14' RGB CS29 00

SOFTWARE

We hive civri ^(JO nt us cu'reilly in
s:ock incljcmu HC.M inset prcqrartls
such as VIEW (£59. 801. HCCS
PASCAL (£49. bO). Cornputtl
Conctpts' GRAPHICS ROM <r39 9E|,
W0RDW1SC (£39.95) (Ad DISC
dociok ltjH,90L PIMM inhtptoae

fO' lul details uf softv/aie Miitm .mi!
CJnert stock.

THE MEMOTECH MTX SERIES
THE ALL-PURPOSE SYSTEM

A new depanuie in microcompuier titcli i(>lt>!;y. she Memotecri VI TX sj'ios is cheacly
comble o v«'y eiiaily oUupUiLiiu to ulrnuv. iiviiry applCDtlon. -uai ymrco tiroucti tlie
sltntla (I tenures below . . .

MAROWAni 32K RAM oi '.tie MIXbCO, €4K )n ilie VTX5I2 RAM expand Mr u
S12K «0 column text iGG!l92 htgh-resoMion fltephes with all 16 colou'i available
32 easily "■evcoblo j»or dofi-ted j/ap n.a i.i i,i ,k,ilii. 3uiiiei uci ifiirKcs pfinw poll two
josstick pons cjshc:ic cort l'%C pan seps<tji:v TV and Video Moniior pons A channel
sojnd A'lth hi-fi outfui teal ti-no dock ful-iwvng T9 Vcv kevbo«'(! with numcic <eyo*d
anj 8 iwin-tunciioii •iu*y: piu; decicatert cuinilqi; port

SCFTWARE - 2/IK flOM wntoni j= it.ii«In'-.l li.i ; ,.i.iti M"X 1AG1C. f/TX LOGO
comrrancs. NOOD'f uuthoi ny langu(QO); ROVI routines inclt-di
ASSEMBLE^:DI3ASS£(W3Lt;n onS sc-een disiiiuy til 7W> CPU regiitet!, tntmoiy 3rd
p'fltjrnm wricn can be i>t-ni|:n .in.:,' from the keylHi.nl: nvchinrj (ode procrMns aio aasiy
i:;illi!i! Iiorn BASIC: Vinu5l ScfM*^n f.-ir.iiiiy flnahAt mm ifi«.«ii|ht ^ocfons &t ti^roi^ t^worli
iii;.:ii.'ii:i:n:ly with fjl' s:'64l fitcititics; PASCAL is *\in ;«tilr a-; in acd-oi ROM pick.
VIP^IOTCCII MTX tOU , £27&.CO

MCWouciimrxDij . KibW

SIR RESEARCH PRESENTS:

OUR RANGE OF PERIPHERALS FOR THE

NEW ACORN ELECTRON

SIR ELECTRON PRINTER
SIR ELECTRON 1 2-RDM BOARD St JOYSTICKS INTERFACE

• Prnyidoi for up to 192K of BOM sp-irn oCFMTRnhl'*'; r'inm intarfsc*.
11 9C o' thij y.il suppoit eittei HUM or

flAMi

• Analocjue-lii-Oijitii Converte' IADCI

• rulVbufleroddesipn. al'ows usn c.l ;my 9BCconipaiible

|OVStlC<S.

• Easy tomstali jist pugsm. no sodcrl ig

necMsaiv. «FiJI limiwarc soppo-t.

• MKWi 'urcc iKponsion via tear etls.«-

connectot.

• Ni su'iicring, plig-in design

• Permits use of n.o«t BBC nOMtw»d #R „,,., . „„,„„„ .«,..«„„„„„

• Priir- £40.00 I VA" OPrce. £46.30 + VAT

AVAILUBLE SOON: INPUT.O JTPUT PORT RS423 WTE^FACE. and mOntl

TORCH UNICORN RANGE

(PM compatible extension! to the 8BC Minmr.onputgr System:

2EP TOO: ZSO /nd »roc«ssoi card: 4EK RAM: hKFf SOFTWARE £375 v VAT

ZXP 280 Disc Pack 2EP l00;2>4(XiK floppy disc drive; FREE SOFTWARE £839 90

2MDP-20; 6800 ptotessoi; 20 Ma£0t>yk» h*rd cisc drive; 4C0K lopjiy di;c d iva full
$y*Mm TIIINir Operating SyMHn £2.005 i VAT

Also: As 2HDP-20 bot with basic UNIX. ..„ £2.400+ VAT

TORCH C-500 Conrjlg-.osof-co-itairedijrui 'NO HHC frtirflD RFniliaFn! ™.«|iwmg OBC
Wicio tyatetn, 70P hi r os coIoji rronitor S Britiah "clocom iporjved coitn-iuiicaliop
caid right us for a competitive qu<>tati)n.

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We htve arance of alternative Word Processing; Busi no. s parages tosec atound rhe ISI5C
Utorocorrvputor ayacm .iv.-ji.ihl*. oi special pnoes. The hiilu.vitai iv*v ^vvtcriiia lejrKMini
mi hrsl v.iltic8asi: end Execuiiyi! par.kEp,os:

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E<ocu<ive Package.

B9C Micro (wilh diiC interlace!:

TORC'I ZEO disc pick with 'WORDSTAR; wcrdprocessor program;

Juki 6100Daifywheel printer:

Back.'Green 1 2" monitor: ONLV £ 1.7D9 lind. VAT>

Tie above p8c*figi«s a-j a'sjo available at expansions for ihose users already ovrninj a
B3C Mi;ioat suitably tedvic;tl piece.

Please telephone u: for a nuoiaion.

All o ir p-ices Die inclusive oi V^T unloss staiart oiher Arise.

Postayu unci Packaging

Please add CI PSP [imall ite-ns: ROV1 Goards, etc.): £10 P&P large Hems: Printeis. Monitors, etc. I

ALjess.'B8fCl3/caiCl Telapnnn? Qr~U}<S wofcointf.

SIR COMPUTERS Ltd.

91 Whitchurch Road, Cardiff Cr4 3JP
Telephone: Cardiff (0222) 621813

104 YOUR COMPUTFR, APRIL 1 984

Program B.

3 CLEAR 29148

10 DATA "c32473f3O6O9c570cd327
25e235623e521a* 1 SOI 1500edbQel lbc
dZ«/k:i^cd2K/^cd2a723e801Z13cd2a7
23e0dl2 1 33e8Cl 223235e23562b2b2b 1
bcd2a72cl lOcSaf 32bO5c3e06ed47ed5
ef t>C?73237223c93at>03Cce»27 1/^/1 /B
0U005f21437119c9cd , '

11 DATA 13291

20 DATA •■Zf72UU21*f3tnJd*!72dtJ2
1575ccd6e72dd21535ccd6e72dd2l4b5
ccd6e72dd21 55Sccd6e72dd21 b25ccd£

o7 2c9f dc b4 74 &2B0bSo2 35&23dd73O0d
d 7 20 1 c 9d d 5eOCddS601 73237223c 9c d4
072dSebedS33d5c«-fed52223dSc2a4f5
r^S^Ah I Sr.3?hcfM-*rlcb"

21 DATA 14526

30 DATA "47c&cd4072dl2a315cafe
d52ed5b4f 5= 1S2251 5c2ab25ced3b3d5
c a-f edS2223d5cd 1 c dOf 732 1 00Q0226cS
c 220b5c c d b D 1 £2a3d 5c 7ef e0328 1 0232
3ed5bb25c ID lb lb732372f deb47d&3a2
b74feff 280332445c 3e*4 322b742afel5
c 2b22555c 21 0COO226e "

31 DATA 135 lO

40 DATA "5caf32705cc9b2ebafed7
2444d03Q3e3ed5bb25cadb81313eb-f9c

9***3* 5c 5d5e5dce5fd3647000He7fe
d781f3B751f3B72112c743e03cdal743
ae271e630cdbc743a3b5c*5*dcb01d«a
f 32085ccdb*02* 1323b3cf dcb01ae3a0
85c*e50281bfe702Bl7"
41 DATA 14624

50 DATA "f*61cad4742:e271d6303
8d24o04t>S30cd21b0Sebe200e3ab05=f
53e02112c74cdal74 181232b 15c*5cdc
b731-38113e01112c74cda:74f lc630c
dbc74cdbe73fdcb475e20O8ddeleldlc
lfl + (JCVtDC+U=U6O121U0tA2b7Cb520*
blO*6c921e271fd3647"

51 DATA 14100

iiO DATA "O03al>i3i-4<bO4ljB3Sief37
e32b 1 5cl 12e74a*cda 1 74* : c630cdbc7
43e0 1 323a5c c ?32b 1 5c a7 1 B092 1 04002
212Sc322b74cdBa723abi5c«7201 f rdc
b47562B153eercda 10^ 3e34cdQ 1 Of 3e0
d32083c*dcb01 eel804*dcb47de* f c ?f
t ft 202020202D2C2020"

61 DATA 13765

70 DATA ,r 2D2C20202020204e4f2i)5
355434S?050F5?A-F47?f»*-f 70703020202
020202020202D2C20202020204f 2e4b 2
0205072&*&72i?-f* 20202020202020202
020202020202042757272656e7420507
2&f672eff413d4e45572d2dS03d45534
34150452d2d2d2d5052"

71 DPTA 11448

80 DPTA "4f 477*».Ti-f9O307r«-f?1O14

O22d074212OlB22d274cd41Oclae67fc
dbc74131a873O*5c9d52ad074ed4bd27
4cd240b22d074ed43d274d 1 c91e4003l
B2ab25c363*2bf?2b2b223d5c2a4f5:f
b c 338 1 2ed 56c9ed5ec 9 "

81 DATA 11580

50OO LET c=Os LET +=29149

5010 FOR h=l TO 8: READ a*

5020 FOR s=l TO LEN a* STEP 2

SVSV Lbl a=CODE a*(f); LET b-COT)

E a* (s+1)

5040 LET c=C+b4a

3050 IF a>96 THEN LET a=a-3«f

5060 IF b>96 THEN LET b=b-39

5070 LET a=a-48

SCOO LCT b-b 40

5090 POKE *,a*lsVH>

5100 LET *=*H

5110 NEXT c

5111 PRINT h

5120 READ tot: IF totOc THEN PR
IIWT "Error at lino ";h*10: STOP
5125 LET c=0

5130 NEXT h

5131 IF f<>2?933 THEN PRINT "wro
ng number of data bytes": STOP
5200 SAVE "cade "CODE 29149, BOO

(COiUinued from oage 103}

Spectrum programmer the benefit of having
up to 10 basic programs stored in the
computer at EHy OIU time — a faci.it y normally
found only nn more cvpersiv? naciines.
Each program is directly accessible by two
sintplc key strokes. Abo, jumps to particular
lines in dilleient programs can be made from
any Basic pognm. For example you might
jump from line 2U0 of program -1 to line 50 of

program 6. Thus program I might lie used as
a rrcnu, calling up fames or utilities stored in
programs 2- u .

The program is easily stored it. the
eomputers: Type in prcgram A and saveusmg

line 9598 then type in program B. When this
runs error free save the code, after program A
on the tape.

When loaded. p-og _ am A will auto-run
pic'sing up the code from program B. You will
then be asked how many programs you want
I -9, Having selected a number you Will th;n
slep inrojgh each program deciding how
main' bytes lo allocate. A minimum is 2C0,
the maximum number of bytLs it determined
by the memory you have free. One; a fix;d
amount of memory is allccai.*d to each
program, it is not possible to change this
without deleting all the prngrarns.

Finally you will be asked which program
you wish :o initially select Having selectee a
program, program A will "disappear ' leaving
you with a blank Ba>ic program ready for your
programming I'rograrn A can b? recalled at
any rime by ielcrting program 0.

If program Is selected using keys it will
auiosun ai line A. If you arc sure you will not
need to reassign memory to th; programs.
Incidentally, ihif has the effect ofNcwing all
the programs other than program at one go.
You can New program 0. There is little point
thojgl: since you have nine other program
stoies at youi disposal.

The niultiprogram routine uses the
inurrupts to check the keys pretaed. To
change ne program you are currently
handling simply press Ctpshifl and Break/
Space.

You will then >»e given the following
message:

A - NEWP-ESCAPE WHIO

PRCG? X
where X is ch? number of programs you are
handling. Prc&sing P will brir.g you back to
\oui current program. Key A will New the
Lurrjiil program.

Do njt use the Sinclair Xew command ss
this may craeh the computer. Otherwise
selecting a mnber will exchange yourctrrer.t
program with the program se.ected. AI the
program variables, current data read position
and Microdrive channels of the old program
will he Kuved. It !k therefore very easy to hop
between programs.

Switching programs

The other way lo swi:ch programs is from
within u rropram itself. U3C the following

nethod to do this:

Rou;ineC 9000 POKE 23619, NT

(L/256} : POKE 23613.
INT (256* 'L/256 -
PEEK 2,'B13)
9010 POKE 29739, S
9020 POKE 237 29, F
9030 RAND USR 2964?
where L = line number to jump to; S =
statement number — normally C ar.d P ■
urogram.

Thus for a mertu routine which calls three
different programs you might use the follow-
ing method:
10 FRINT "GAME 1"
10 FRINT "GAME 2"
C-0 FRINT "GAME 3"
40 INPUT "WHICH GAME 1-3 ?" ; P
EO LET S - : L -
60 GO TO 9000 Routine C)
Foi those of you who progrrm in machine

code it is still possible to have a RAMtop area
free for code. Do this by ihering the variable
RTO? In line 22 of program A.

Different programs occur a: different places
in memory so the first byte of a li.ie I Rem
sniemen- is not necessarily 237o().

When using the pr.ntcr you will need to
mm the interrupt routine :>ff. Dn nis by
typing:

RAND USR 29227
Turn it on again by typing:

RAND USR 29230
Vol can jump between programs with the
interrupt routine :urned off using Routine
C.

The following is a list of subroutines used
by the machine code-routine:

Adcress

Function

29149

Interupt vector sends interrupt

routine here. JP to 29475.

29152

Initialisation routine

?9226

iNunibe- store routine for above

29231

Calculates address of system

variable storage area "or each

program

;9?48

Routine to either retrieve or store

necessary system variables

20222

Mmn online to swop system

variables

29455

Routine to move machine stack

below new program RAVItcp

29475

1 Uerrupt routine

- ReaJs keyboard + check for

Capohilt, Space/Break

— Waits for P. A or number

Cal s different roulines

cepend ng on what is entered

29G30

Delay loop

29613

Main routtio wh ch colic swop

rDutnc 29322 and checks for

erro's. llf the program number is

uu hitjli ori '..-itui inuBbiice will be

civenl

29857

Print a siring routine

29883

Print a cha'acer rou'ine

29927

Int. routine off

29930

Int. routine on

For tape copies of the program please send
12,30 ar.d i stamp addressed envelope to
Mark Joies : 17 Park Walk, London SW10
OAS. Please state that you require
Multiprcgram. ■

YOUR COMPJTEfi, APRt. 1 934 1 05

U$****\

MS*

See us on
Stand 134

&

Compatible with all "Atari-style

9-pin joysticks

Plug in cartridge design

Tough plaslic casing

Does not interfere with

keyboard operatbn

Available from your dealer or

direct by mail order

12 month guarantee

Games coming soon from most

software houses

Extends the versatility of your

Electron computer

WW,

for use with our interface /&&&£> & / / /

"Cylon Attack" by A&F Software /<&&&\* / ///

^^^"*^^% First Byte. Dept VC /' . ^ 6? <P .■■£

STOP PRESS - Now availab
for use with our interface

SYTfc

Flr«* Byte, Dep* VC. ^^ <P <+*

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DEI 2PE Tel: Derby / # »°JT / / / J

(0332)365280 / <$ff ^ / / / '/

A Genuine First Byte Add-on / <f) ipjd^jF / / *$''

NEW

ZX81

SPECTRUM

KEYBOARDS...

APPLE II

COMPATIBLE

COMING SOON

with grey and white key caps
WOKING COMPUTER CENTRE 4^

32 Chertsey Road, Wokhg, Surrey. Telephone: Wcxing (048 62) 23845 X

TheZXSpect/umis
the best Hcmecomputer for
Software, both edjcatlonal and
games. The main flaw is of course the /J* ^

keyboard This Classic 19 5x7.5x1 5" keyboard and / <0 -^p
lousing are designed to accommodate the 2X81 and Spectrum y j$ ^
persona computer. A professional r 'ull size "L)werty'' ^ ^ ^ v "

$

./

keyboard has been designed, with full travel keys and a full </^> v ^ ^
size space bar. Special f jncticns are strategically placed / y <^ <i'
for rapid programming and ease of use. Designed y s ^o 0*
today for users of tomorrow, you can play the "/ ^ & .

fastest of games with the greatest of ease. S / <gS J? /

Its easy to assemble too, you need S /«& x« J? /

/L<? J^ *? *' / / / »

/

Its easy to assemble too, you need
1 Screwdriver and 5 Minutes — Simple!
Available in a tA/Hteor Beige housing

/:

.ft*

rff «JP* #

o- c* 4P* ^

^1

Cr ■■?■ -

'fr^tf

106 YOUR COMFUTER. APRIL 1984

Srw.l ArR'S NFW QC. micro has generated more
txcitcmen: :han any of his previous
computers so Your Computer .s giving \ou a
chance to win one.

The biggest seeing point of the QL will not
be the massive 128K RAM, nr>r the fast
68O0O 32-bit processor at its core, nor even
rhe QI.'s ahiliry rn put windows up on screen
with different programs running in them.

Everything in a package

No, (he best thing about the QL is that
everything comes in one package. For £400
you will have a rromputer with two built-in

micro drive, to give nws:< storage which conns

with four pieces of software, ihe Quill word

processor, Abacus spreadsheet, Archive filing
system aid basel lor displaying charts.

All you need to do iS add a primer of your
choice to put together a complete system.
Compare Sinclair's tidy Ql box with the
spiders weh ftf wires and desk full of
expansion RAM packs, drives 2nd interfaces
which you would need to achieve that sort of
performance from most micros.

Here's Ihe catch

Here's the each — tha's exactly what we
want you to do compare the tiei-cp you have at
present with trie QL. Fill in the coupon and
then in the space for the "before" rriccure
sketch au outline of what your system looks
lite at the moment.

If you would rather you can draw it on
another piece 0:' paper and paper clip it to the
coupon or even enclose a black and white or
colour photograph of your set-up.

RULES

■The winner of the corrpetitiDn wi I
rje the person who sends in the
sketch or photo which most
amuses the editor and in the view
of tl*e editor, completes the
jniinished sentences in the most
nteresting way.

■The rarne of the winner will be
Drinted in Ihe dune issue of Your
Computer.

■All entries must arrive at tho Your
Computer offices by the last
working day ir Arjril 1984.

■bash person may enter the
competition only once.

■ Entries to Ihe competition cannot
De acknowledgec.

■ No ernployses of Business Press
nternational of their relatives may

enter the competition,
■The decision of the editc 13 final.

■Mo correspondence on the result of

:he competition will be entered

nto. Business Press International

assumes no responsibi! ty or

iabiliiy lor an/ complaints arising

fron this competition.

WIN A SINCLAIR QL COMPETITION

9p*

If vou want to win the new Sinclair QL in
addition to putting in your sketch or photo
you must complete this sentence in 12
words or fewer anrJ send this rjotpon to
Yojr Computer, Quadrant I louse, The
Quadrant. Suttrjn, Surrey SM2 £AS. "I
think Ihe QL in Sinclair CL stards for

Name.

Address.

:j

YOUR COMPUTER. A B RIL 1984 107

PSYCLAPSE & BANDERSNATCH

COMMODORE 64 48K SPECTRUM

REINFORCEMENTS

ARRIVE!

4

-** 4

v%

! lbs

. ..fc.f-

^

■

After eight weeks of total concentration by our four master programmers Psyclapse & Bandersnatch,
the two most original computer games ever conceived are entering the final phase of creation.

Now the Imagine l A Team' have been joined by (from left to right) Steve Cain, Ally Noble, Dawn
Jones, Abdul Ibrahim and Fred Gray.

Steve, Ally and Dawn are three of the most accomplished graphic artists in the country
and Abdul and Fred are two highly respected musicians.

Their task is to enhance these magnificent games with dazzling animation, stunning C^T^^
effects and electrifying music, ^-"^^ V •

Psyclapse & Bandersnatch, a treat for your
senses, coming soon from Imagine.

N^

// ..the name
of the gome

Imagine Software Limited, 5 Sir Thomas Street, Liverpool. Mersevside L I 6BW. Dwter Fnoiiri^ CYm-art Sharo-i O'Brien on 051-236 8i00 (20 lineo).

GET

GET

SNAPMAN

After seeing a version of the Pac-Man game-
in action, I decided to write a version for the
Commodore 64, and this is the result.
Graphics are very extensive. There are twe

different mazes produced from user-definec
graphics, eonliining pills and power pills ;
each worth 10 points. Also, at random
intervals, fruit appears bereath the ghosts'
kir, and can either bt a cherry — JOO points :
siravbcTry — "JOO points, or the Commodore
logo — 1000 points, There are four multi-
colour ghosts with mobile eyes and ecible
bodies, and one Snapman.

Movement of the Snapman is controlled by
3 joystick — port one — or the keyboard.
Ghosts have the logic for angry, fearful,
rindom or homeward motion, and move at
half speed after you eat a power pill. They
f.QGl: white when they are about lo return to
norma!. They an also hide beneath one
another to cor.fus; you.

The Snapman scenario

If :he details above have pereuaded you tha:
the game is worthwhile, here is its scenario:
You are a little hungry Snapman, losi in the
food nuze. To keep going you must eat the
pills and fruit of the maze, while at the same
time avoiding the angry ghsst monsters,
vhosc trjuch means death. However, you do
have a weapon against them. Thiy become
edibie when they turn blue after ycu have
eaten a large power pill — ghost scores are 1st:
200; 2nd: -'.00; 3rd: 800: 1th: 1600. After all
ue pills ir. one maze have been eaten, you
escape to a new aid faster maze. Thi>
continues until al! ynur hrce lives arc lost.

Snapman comes in two parts, a Basic
ssction to handla register:, the maze and
suonng, and a cods section which stores
graphics and the main game. The code is
loadad as a set of hexadecimal numbers.

To help with entering [he code, 1 have
included a third program. If you Run it, you
can start at any point along the :ode and enter
the numbers. After you have finished, use
RUN 700

This wif display totals of numbers in lh_-
sections of memory, and the correct totals. If
these do not agree, there is an incorrect

David Rees gets to grips
with the grizzly ghosts.

number in that section of memory. You can
then use

RUN 900
This gives a scresn listing from £ny point

along the cede, in thi Kami formal as the

magazine listing, and you can use it to find the
mistake.

After the mistake has been foLnd, you can
use the first inpt;t routine tc correct it.
Finally, when you think thai aL the code is
coirect, you can save it directly after the
Snapman Basic program on the tape by
using

RUN 1 1CO

It ir- bc>t to stive the cede after the Basic,

because the prcgram oacs the code shonly
after you have Pain it.

3f there is sti.I something wrong with the
code after it his been saved, use the Banc
Snnpman program to Load the code, 6top the
Basic, Load the input program, and carry on

as if you had found a mistake js above.

My highest score on the standard -game is
224610. However, if you want to make it
harder — or easier — far yourself, it $ fairly
easy to change the format of the game for you:
cwn use.

L gives the number o: lives that you have
left. Although only a maximum of two lives

are displayed on the screen, L. can be any

r.umber in the floating point range. Also, in
line 540, the Stop and 3.es:orc keys are dis-
abled, m stop anyone from ruining the game
j.tst when you arc reaching a record scon:. If
you waat to be able to stop the game, simply
charge the number it the end of the line to
255."

TD is another .mpomnt variable, control-
ling the speed of the main program, with a
normal valae if 3043. However, if the itart
speed is too fast all you have to dc is increase
7D, and for a more challenging game, simply
reduce I D 1-cr the tastest game possible, TD
should equal ''.ero, where the speed will be
i00 moves pet second. Also, if you want the
speed to increase at a different rate, simply
charge the number 100 in line 5110.

Loading graphics into RAM

SO. controls the type of maze used, so if you
want to use only the b:g tnaz; or the small
ma?.:, keep SC constant by chsnging line
5120. h"y varying this line, mazes can appear
in any order, and by dunging lines 560-90C,
provision can he made lor mirr ma'/^s rn lift
added ;n the gap between 2000 and 4899.

Care does have to be tiken with one section
of the program, lines 45 to 95. This loads
normal graphics in.o RAM. To do this,
Input/Output memory has to be switched out
of main memory. This means tha - . funct.ons,
like key input, must b; switched off, so if
there if an error in this, section of program,
there is no way to res:art the computer, except
by switching it o:T and then on.

Finally, if the program seems too lor.g to
type in. and yoai would prefer -o receive it on
a C15 cassette, send your name, address, and
£3 to: David Rees, The Georgian House,

3ro'?ks Close, Weybr.dge, Surrey KT13

OLX.

rlcx loader.

1Z0 NEXTN

780 M*<8>="3BBB" : M<8)-14336 i Mf< 1 )«"2BBB"

130 IFKK(RB>JTHEH28

710 m 1)-15104 ! !«C2>«"4808" : M<2>«16284

: REM****************

140 RETURN

720 rt»i:3)-="440B" :p|(3)-174B8:M»i:4)-"4800''

2 REM»«X COBC INPUT*

20B 00SUB2?

T39 MM^^Sa^tW^'^BeO" :M(3:i = 19:00 •

3 REM* PSOORftM *

210 GOSUBSaa^RJNTB*

7«0 ft»C6?«":00B":M<6>»20480:rtf<7»-":0D3"

4 REM* INCLUDING *

220 GOSUB550::FN»16THENZ20

730 PK7)-20E91

5 REM* ROUTINES FOR *

230 Oh*16 : PRINTS! ;

768 T<B>=67:8e:TO>83622

6 REM*CHECKS +3AV1NG*

240 GOSUBJ50 : :FN»16THEN240

77Q T<2)«1B?791:T(3>-1!42<4

7 REM* BV *

230 P0KEB,>N B-B+l PRINTfl*

788 K4)»99S13:T<3>133893

8 REM* DflVIB REES *

340 IFKJ+1THEN210

798 K 6) "22370

9 REM****U***«******

330 EMI

eea forn»btcs

.0 REM»EHTER NUMBERS*

300 Dim* CIS)

8:0 T=8:R=M<N):B"M<N+1>

:i 0OSUJ58C

310 FOSN-0tO9 R*CN>»RIGHT*(STR*CN>,1> NEXT

820 FORM=flTCB^TiT+PEEK<M) NEXT

:5 PuKE52,:5"PJKE36,35:QOTO208

520 F0KN«=13T0:5 : fl*CN>-CHR*CN+35) : NEXT

830 PRtNTM»<N)* TO "Mt(N+:)

28 B*0 t»l<t*!e24:;»20S91

330 RETURN

840 PRINT" CORRECT="T<N>,*flCTUfiLLV= ,, T

30 INPUT-S1WT POSITION", P,*

330 GE TR* ■■ I FR*»= " "TKEH33B

850 KEXTH

40 il-LhH<HIX>4TH5N30

36« hUt<N"k)IUlD: H-H*«N*t.N; 1 HtNKt IUKH

8»y kttWtfc* LHiUM

50 F0RN»1TC4

570 NEJ<T

980 GOSUSSB* i GO3UB20

60 wriSKHi.'j.i:

580 N= 16: return

9:8 E»BftHD32768

70 FORM.8T013

600 C*IRND13:D»<BRND24B)/'I6

920 GOSU360e

so ]K»i.n»(rt>TxeNj la

£10 E-<BflHD3840>^236-F- < BR ~03Si 7 2 > .'40S6

930 FORt1-eT07

90 KEXTM

620 BJ=A*<->+fl*<E>+fl*<D>*R»;C>

940 F=PEEKa+M>0=PflND15:R=CFRND249;/16

.00 GOT048

630 RETURN

.10 B-BK2-<4»(4-N)>)*ri

699 REMCHiCKSUMS*

(Hex loader continued on page 111)

YOUR COMPUTER, APRIL 1 904 100

HIGHFLYING EXCITEMENT

FROM fl

HAVE YOU THE SKILL TO FLY
AND LAND AN AIRLINER?

From take off to couch down you're in control. Flight control

is totally in your hands. Keeping your aircraft in f jll Flight

will be as complex as controlling the real thing.

You'll be able to takeoff, manoeuvre, navigate, and land

tne aircraft using realistic aircraft controls. You'll chart

yow present position on a map or view the runway as

you land without losing sight of vital instruments,

In fact, you'll hardly be able to tell the difference

thanks to 'Airliners* range of features.

Have you goc what it takes to be a high flyer?

vumiiE

See the complete range of action packed computer
games from Protek at your local computer store.

^ : *v

n

•TJBfltf

^k8,48k

and Cornmoi° r(

VISA

Protek Computing Ltd, 1A Young Square,
Brucefield Industrial Park, Livingston, West Lothian. 0506 415353.

(Hex loader continued from

page

109)

1100 F0RN=9T033

J tie RE=IBh POKE4e7044-N,ft

930 I*=M+" ' , +flf<P)+P*(Q>

1120 UEKVi

960 NEXTK

1130 SV340T04

9 T PRlhTBrB-3+e

J200 DflrR 1*9, 36, 133.232 165.81,133,234

9«0 IFBJJ+STHEKEHI)

1210 DRrR!69.,132,231,133,233

998 GETFt : I-R*=" M, THEN998

1220 PRrfll62. J, 1E0, 235-32, 186,255

I860 G0T0923

1230 DRTR169. 8, 32, 183, 235, 169,231

1699 REI**SA/E*

1 240 DRrfl!66 « 253, 164, 254 , 32 , 216, 253,96

Basic program

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1 1 4 YOUR COMPUTER APRIL T 984

isionj (Software Factory) Liraitsd software is available f 10m
«3on Lightning dealers Makro Marmes Prism dealers Re

s) Ferrantl snd Davenpor. Gret>.is
wore City Spectrum cealers SupaSraps (selec

I^VHH^^^H

Keith Miles with a Basic
program for the BBC
Micro that makes use of
EOR printing and multi-
colour characters. This
makes Squares shorter
to type in and faster to

Play-

SQUARES IS a variation on an arcade game
written by several software houses.

The aim of Squares is to guidj your boot
around the jric, colouring each line and
square traversed 'l"he values shown in the
square* are added to ysur score as ihcy are
made. To make it interesting a monster is
pursuing \ou. This creature will erase all lines
you have coloured that do not form a part of a
square. There ore also immobile iv.oni-ters that
periodically jump to new locations which you
should be careful r.ot to run into. As you
proceed to higher level* the number of these
latter monsters increases as does the
frequency of their movements,

The particular features of :his game thai
mabe it different front most games previous.v
written in Basic Is that it rrakes ezteosivs use
of Exclusive Or — EOR — colour printir.g

and multicolour chaructcr3.

Shorter and faster

When printing at the Ciraphics Cursor —
VDU 5 — it is possible to superimpose
defined or any nther rharacgers on top of L-ach
01 her. Using different cciours for the different
features of the character to be created, the
character is assembled by moving the cursor
to the required location and iuccessivcly
selecting r\\e foreground colour of tht part of
the character to be printed, printing it and
moving the cursor back over the character.
In Basic this would take :he form:
VDU5 : IVOVE X,Y : GC0L3,Y1 :
PRINT CHR$iX1i : VDU8 : GCOL3,Y2 :
PRINT CHR$iX2i

etc., where X,Y are the desired scieer. co-
ordinates, Yl the colour of character XI and
Y2 the colour of character X2. The VDU
commands cat.se printing to take place at the
graphics cursor and trove the cursor one
space left respectively. The man, squares and
walls in the game are constructed on this way.
The>e commends can all be replaced and
strung together as VDU commands eg.,
MOVE is VDU25,4,X;Y; GCOL is VDU 18,
3.Y1 and PRINT is s.mply VDUX2. For
example, the tbove line of Basic would now
read:

VDU5.25.4,X;Y:18,3,Y1,X1,8,18,3,Y2.X2
Not only is this shorter but it executes faster.
This is very important for the more
complicated a character is the lonjcr it takes
ii> print and the slo%ver movement wi'l b;.

EOR printing is iapenant when coloured
characters arc to be mov;d. Refer :o the User
Guide for a detailed explanation, but when
priminf! graphics chcracter; colour i3 chosen
with GCol x,y w.iere function x determines
how colour y will be printed, x can hive five
values C, 1,2, 1,4 which respectively print the
colour, Or it with the colcur already there,
And it the colour already rhers, EOR it etc
aid Invert it etc. EOR (3) is used because it i>

SQUARES

Program 1

10M0DE2

20VDU23,1,0;0;0;0;

30VDU23,224,31,23,31 ,23,127,255,0,0,23,225,0,0,0,0,
0,0,255,215: REM Boot, sole

40VDU23, 226, 126,255, 153, 153,255,255,255, 170,23,227,
0,0,68, 102, 0,0,0,0:REM Monster ,eyes

50C0L0UR1 :PRINTTAB (6,1 ) "SQUARES. " :C0L0UR2: PRINT ' ' "

BUIDE YDUR BOOT"'" AROUND THE GRID OF SQUARES S

CORING POINTS FOR EACH"'" COMPLETED SQUARE, WH

ILE AVOIDINB THE"*" BLUE MONSTERS. "

60C0L0UR4:PRINT'"LINES CAN BE REMOVED BY THE PURSU
ING" * " MONSTER IF THEY DO" ' " NOT FORM A SQUARE. ■

70C0L0UR3 sPRINT'" YOUR MOVEMENT IS*"" CONTROLLED B
Y THE*'" CURSOR KEYS."

80C0L0UR1: PRINT'" <RETURN> TO PLAY"'
90C0L0UR1
100VDU23 f 3,31,17,23
HO*FX21,0

1 20 1 F I NKE Y ( -74 > MODE7 : CHA IN" Square2 "
130G0T0U0

possible to predict the outcome of function
and by careful manipulation cf the colour
paku; usin^ VDU 19 to enable characters tu
move over other characters.

Hor example, Red — colour 1 — EORed
with Blue — olour 4 — gives Magenta —
colour 5 — if a red character is printed on :op
uf a blue character, but if colour 5 is redefined
to be red - VDU 19,5,1,0,0,0 - that part of
the red character over the blue character will
show red rot magenta. The EOR values
needed are mathematically derived but ran be
easily found by using the BBC's own EOK
function — type 1 EOR 4 to chick the above
example.

The game itself consists of a series of linked
procedures whi-h are called from within a
Repeat Until loop A'hich controls the game.

Variables.

Ivl% — level. bootxXi and monster* % —
horizontal position, br>oty% and
monsterv% — vertical position, right% anc
HORZ%-0 or i moving rigr-t or left,
Down% and VERT%-0 o- 1 moving up or
down,colour% and COL0R%— colour of
lire t ro versed, col % and COL%— ccloir of
line coloured,{oldx%,oldy%,OLDX%,
OLDY%) — starting morriinnn-is of meve,
ihor%, /er%,HOR%,VER%' -destination
coorcinates of move,linedown% and
Iinoacro3a% positions on the grid stcied
as a decimal ec., 27 = irtersection 2
across and 7 up,across% and down% —
ulJ liuii.'uuicii and vertical location of
monster,fill% — flag for numter of squsres
filed,hit% — flag for identifyhg game
over.

F:ogiam 2.

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1 1 6 YOUB COMPUTED, APRIL 1 984

Arrays

X%( — l,Y%l-}-hori7ontai and vertical

locations of grid intersections on Graphics

gric.

sc%(X,Y)-sqaue scores.

line£cross%{X,YJ— status of horizontal

lines (0 ml Li.jwKibeLl ut wiped by i mui isLei,

1 travcrscc, 2 secure in a square).
linedown%iX,Yl status of vertical lines.
MX(-),MY(— ) — horizontal and vertical
loca.ions of still monsters.

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/

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X

^J,

I

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A

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/ ////

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// //

CDS Micro Systems

C0L055U5
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XXX 1005 REVERSI XXX 2006

XXK 1000

XXX 1007

CDS Micro Systems

CDS Micro Systems

5PlCTSUh\ I6/4HK — -? V m ■ SPECTRUM 48K

CDS Microsystems

r WINGED WARLORDS

spccmm t&48h

new... Spectrum
Arcade action

CDS Micro Syst&ns

XXX 3001
XXX 3002

JptCJRUm 16/46* /HJ

CDS Micro Systems

CDS Micro Systems

SPECTRUM 48K

ems.:Commodore 64,Spectrum,0rlc I

, JohnMenzies and other leading Computer Stores, or... Available direct from CDS Micro Systems
IdCloseJickhill.DoncasterDNll 9LA. Tel: (0302) 744129. (Trade enquiries welcome) * u^amn^.

Will you
w accept this
mission?

In your Z5 Luna Hover Fighter
you must penetrate the 3
successive Seiddab defensive zones
and dest'oy their command base.

Tie state of your fighter and irs
armaments along with s:atus
report cf the Seiddab defences is
given beiow.

Good luck, May the power be
with you.

LFAlSlEl RlST^

V hort range weapon system.
■P Indium powe'ed Powered up
ard cperatnnai.

n a w is b n

D

• S H I E LID S ■

r-lirhii/m Doweied. Cumbat
power level Status all green.

G A U G E S

Long range propeiuene tanks
Status full. Combat shielded.
Hull temperature status lew.

KNOW YOUR ENEMY

DlAlBHTlA ilMlKlSl-l

% obotiea ly cortrolled. Ytsan
T miss les- ^rmed. susceptible :o
laser strikes.

high power, tow manoeuv^bility
strike craft Hodium missiles -
armed. Susceptible to missile
or laser strikes

|' 'niT i, si s| \l

Long rarge weapon sys.ero.
Radar horn ng duodec warhead
A'med and ready to fire.

£5.95

£5.95

Long range, over the horizon
sei nuii. TuntU tJ the ptaiiita
output of Seiddab hover fighters.

1-ilSllA VJIJG A T 1 O iM ■

Locked on to tie Seiddab
command base. Head up path
display.

"his is the atest anc most
W difficult mis^inn in the long
running struggle against Seiddab
aliens - are you oreparcd to accept
fits mission?

Available for 48K Specif um frarr all leading
software dealers including Boo:-,, John
Men'ies, Spmrun Computer Centres, etc

AU*ltaM«#v* »cfccr ponuljir home nlcrci lean.

^Pontaln proximity fuses,
^explodes on detecting
hove'figliter. Susceptible to
laser strkc.

Hew/son Consultants
568 Milton 'Hiding Esie te.
MiJtcri.AUiiyc-uri. OxonOXIt 1RX

!m!i1s |S1||L E;- : S|l LP

■ inal line of defence - self
activating. Hews:ron
Warhead. Susceptible to laser strike.

M| our objective - heavily

l defended requires rrany strikes
to destroy - you must not fail.

Space Quest — for the 16 or 4SK ZX
Speeirum makes use of fast rnachin: code and
high resolution colour grtph.es :o create a fast
shooi-'em-up game.

Yn i are alone in your gleamir.g nuclear
powered spaceship as you steer through the
hazaidous space lanes until, unwtrned, you
are attacked by the blue budgies a violent lace
of creatures who get their kicks out of
dropping bombs on passing space ships. If
you can survive long enough to kill them all
you have to do is steer through and destroy a
whole asteroid belt. Nex: you come across a
band of bjttcrfly fcanditos who lUe the
budgies enjoy bombing passing spaceships. If
you ran destroy all of these, you have to
destroy another asteroid bell and only then
can you geL back in the space lanes.

This game al.ows a large number of keys to
bt usl-cJ; any key from Caps Shift to V is left,
ar.y key from B to spacebar is right and any
key from J to Enter is fire in rounds 1 to 4 and
thrust in the space lanes.

To enter the program type in isting 1 and
sava it to tap; with

SAVE "SPACE 'LINE 1

Next comes the 3K cf machine code. Type
in listing 2 and run it. When run it will I'okc
the machine code onto the screen so do not
worry if the screen starts getting messy — this
is because there is not enough room for Lie
data and the machine code if stored normally.
A checksum is used on the date so the
computer wil. tell you the line of an;- error it
finds. If an error does occur, check and correct
it and reran the program. When it Pokes in
all :he machine cod-: without an error it will
save the resultant code.

The program is ready

IF you now rewind the cassette the progrtm

is ready. Type

LOA3 ""
and after loading the Basic program it will
auto run and load the machine code in.o the
correct place.

The game is now ready and the instmctions
should be printed on the screen. When your
game is over, .f you *ot a high enough score
you will be asked for yo.tr name for the nigh
score tabic. If you wait about 1 *e<.uiids> when
it has printed the instructions a ccmo mode
will be played of all the rounds except the
space lanes.

For those who find the game too easy or
hard, here aic twu aUdi esses which cuuld
help.

Address 29562 holds how man? lives you
start off with, normally threi, so by Puking it
to nine you sttrt with nine lives.

Address 29567 holes how long lite pause is.
Normally the ^ame is too fast so during the
gimc the program uses this number as the
length of the pause between moves, normally
3D. A Ioa' number makes the game very fast, a
high iiunibci makes the gtune slim.

Finally thank-you to, Robert Rhodes, a
friend of mine who translated the music to
Spectrum Beeps.

Space Quest — 'isthg J,

1 POKE 23675,72s POKE 23676,1
27

10 BORDER 0: PA=ER O: INK 7s C
LEAR 2939*: -OAD ""CODE 29400

20 DIM a*<5,10>: DIM a<5>

21 LET a*<l)="Jason C": LET a
( 1 > -2730

30 CLS : P^INT AT 0,2: INK 5i "
"! INK 6;" ": INK 7;" space Que
st "; INK 6;" "; INK 5;' ■

40 PRINT AT 7,7; "Caps to v = L
e*t";AT 9,7t"b to space = Right"

50 PRINT AT 1 1 , 7 J " j to enter =
Fire/Tirust"

60 PRINT AT 13,7; "h = Half'jAT
15,7; "s = Start"

7U KK1N1 fll 2,6; "By Jason Crar
lesworth"

30 FOR a=l TO 1000 t IF IN<EV*=

"S" OR INKEY*="S" THEM GQ ^D 100
O

90 NEXT a: RANDOMIZE USR 29400

:00 GD TO 30
1000 POKE 23300,0: LE" 1=USR 295
51: LET sc=:0OMPEEK 23296*256#P
EEK 23297) +10#PEEK 23298
1010 GO SUB 2000: IF MOT sc THEN

BO TO 1060
1020 FOR a=l TO 5: IF sc<aia) TH
EN NEXT a: 60 TO 1060
1030 IF a<>5 THEN FOR b=5 TO a+1

STEP -it LET a*:b>=as(b-l): LET

a(b)=a(b-i: : NEXT b
1040 INPUT "Name please ";a*(a)
1050 LET a(a)«sc
1060 CLS : PRINT PAPER 1; BRIGHT

It INK /; " Hi -Scare tab

le
1070 FOR a»l T3 5: IF a (a) THEN

PRIST AT 5+2*a,S; INK 5;a*(a)s"

";a(a): NEXT a
10BC PAUSE 200: GO TO 3C
200C LET a=20/76: LET b=a/2: LET

c=a*3: RESTORE : FOR q=l TO 36
20 1C READ dt IF d^50 THEN PALSE
H-INT (a*3.33): GO TO 2C10
202C REAL e: BEEP d,e: NEXT q
203C RETURN

204C DATA a,0,c,7 T 5O,b ,0,c,7 ,50,
b,0,a,7, 1.5*b,7, . 5*b,7,a, 12, a, 16
205C DATP a,7,1.5*b,7,.5*b,7,a+b
,7,EO,5Q,a, 16, a, 19, a, L6,a,l2,a,l
9

206C DATP b,16,b,12,a,l«?,b,l£,b,
12,a,7,1.5*b,7, .5*b,7,a4b,7,a,0,
c,7,50,b,0,a

2070 DATP 7,1.5*b,7,.5*c,7,c,12,
e,16

(Listing 2 is on page 123)

fOLR COM'UTER, APRIL 13B4 121

z* <S»

DICKY S DIAMOND

® Another cliff-hanger for the /H-

'V'

\

'kZ&S.

WSE$

/Z

ip!»!s|i.* cow alffiiift--"

■■*.

ONE OF 0\/ER 60 GAMES
FOR 10 COMPUTERS

Available from Dlxons, John Menzi es, VU H. Smith, Boots and a I J good computer stores

272 Argyll Avenue, Slough SL1 4HE

■

Space Quest — listing 2.

1 DEF FN x (a*>=»16*(C0DE a*-4B
-i39 AND i*(l)>"9"))+(C0DE a* (2)
-48- (35 AND a* (2) >"9" ) >

lO LGT x-16304i FDR a-O TO 32i

READ i*i LET t»VAL a*< TO 4) t L
ET a*=a*(5 TO )l FOP b=0 TO 63s
LGT /-FN k <a*<b*2-«-i TO b*2+2> ) •
POKE x t y: LET t=t-y:t LET x=x+ls

NEXT bs IF NO* t THEN NEXT ai G
n Tn 4C
20 PRINT "error line ";a#10+100

30 STOP

40 SAVE "Quest "CODE 16384.3367

JOO DATA "6B49cd537c3#0132045bc
dab770£cSc50e043e05328f5ccd<b376c
d95793ad45cf ef f2073cl 10e8cdfc7b3
e02320 45b c d ab 7 706c Bc50«Oc3b0332B
f5ccd4776cd2176"

110 DATA "69623a04Scfeff204«cil
<JeUcabJ/c*eO332O45bedab7706c8c50
e0B3eO£328f 5cc d 637 6cd95793 aO 45c f
eff 2029c 110eBcdfc7b3eO432045bcda
L7706cEc30e0e3e"

120 DATA "723B02326f5ccd4776cd2
1763a045c-eff20O4cliOedb9clc9973
20O5b32O15b32O25b3e0332035b3»le3
20b5bcdd475cda373cdcc74cda373cd5
a75cda373cdc473"

13f> DATA "6294ed»373ed5274qd*S7
318fi02ia40311 3200cdb5032 12c01 1 15
OOOcdb 5032 1 84031 1 3200c d b50306327
610-fdc9cdR37-?!pfl^S704; c ih<77T?na5bc
dab77 c db37ccd4f"

140 DATA "713678cddi7ccd4f7B3a0
d5bfe00203bcd3J76feC02B330eOB3eO
6328- 5ecd6376cd9579cd4 i 7B=dif 78c
d317©+e0O281?cd4f78cddl7ccd*f7Bc
d3176fe0028093*"

150 DATA "55B30d5bfeO02O031Bb6c
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160 DATA "7058O45bcdab77:db37c9
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170 DATA "55BiOd5bfeO020DBcd3L7
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180 DATA ,, 768Ecdab77rdh^7rrri4-7
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190 DATA "5235cd3176fe002B093a0
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0f32.0e5b061e3£002310fb3a035b3d3
2C35bfeO0c2d374"

iUO DA1A ••702£clc9cdfc7b3eC2320
4Ebcdab77cdb37c97320a5bcddl7ccd4
f7B3aOd5bfe002C35cd4f780eOc3e033

2Ef5n-d4776cd4f7Bt.d2176cd4f7B3aO
d5bfe00201Bcd4f"

510 DATA "647«;78cddl7ccd4f7B3aO
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bC6 1 97ef eOf 3903d60a77232323 10+ 39
7320d5bcd2c773a035b3d32035bfe002
06bc:c9edab77cd"

220 DATA "7l63b37c9732045bcdI27
7C Ibc02c5cdd 1 7ccd7f 763a0dSbf e002
01acd2176cdc07£cdrtl7c3aOrt5hfi.O07
OOac . 0b97b920dcb820d9c?c 197320d5
bcd2c773a035b3d"

230 DATA "5B4232035b+e0020b5clc
93a0b5bfe00c847c5060010fecl lOfflc
92 1 2d5b061 97e232323e6S0f e802004 1
Of497c93e01c93aOa5be6O2fe022OO40
6021B020601cdO , ;• ,

240 DATA "56367b3a0a5b3ee6C3320
a5bc93a0a5be6O2fe022CiO4O602 18020
60lcd4>c/0JaOabbice6O532Oa5bc93a0
55b4ff5fea730030c0c0cc501febfed7
fie60fclfe0f280c'*

2SO DATA "Dti'»3OtJCidOd0d0d3eJctiV3
B020e3cf Ib9c8c5ed4b055ble01cd5e7
dclle003a065b47cd5e7d793205=bc90
60S212d5bc5cS4c2346cdO'?7o0cCc0c7

9fetd382eOe0823"

260 UMIA "fc030234697bB20043a2e5
b47cdde7b7de6036fcb7c2BOS78B5471
B 3378954 77Sf e 1 = 3B0206 1 c 7.8f eC>3300
20603c t e57 1 2 37Dc d ad 7 ae 1 2323c 1 1 Vti
4c9010e00211e77"

270 DATA "5685112d5bedbOc9980f2
dOf 52O^7tOfOb0f 00OO0000O64O:l3783
de60732Bf5cBd4a055b971eOOcdac7d7
9c6CB4f 3e02cdae7oc 1 c5783de607672
4?f»f'1 1 I0500cdb5"

2BC DATA " 734303c 110d23e07328f 5
e3eCfed4b055bf5ccde7be5c57ce6036
723110a00cdb503clBl7ee60732f77f7
d*6«032ff7f Ie003el5cdac7d9732f77
f32ff7fle013el5"

29C DATA "70837ecdac7d0df 13dfe0
020c43»151e00cdac7dc93e07328d5cc
d6bCdcdcdi f 21 efe7706233e4+ 328f Ec7
ed723lOfb3el6d797d73el4d73a035bc
630d73el6d7°7d7"

300 DATA "51923eldd73a0i5bc630d
797cd0978c9 1 600002053636+7265202
Q2O2U2U*U<:U204c69766573202O2O2O5
26f756«6420202020e5c5f5473a025b2
aOOSbBOf e3a3B03"

310 DATA *6I 15U60a2332O23Q220OS
b473e44 323f5c3el6d73eO3d73e07d79
7b c 2003b d 280 7ed4b005bcd 1 t l«3a025
bct30d73o30e79732Of5cflcleii. , ?3ci0
75bfeO02OleOlfe"

320 DATA "S137bfed7BebOff e0fc83
p0132O75b2aO5Sb2d2d2d2d212'1 24242
2085bc9ed4bCB5bleO13ellcd727eOd0
dOdOd3e08b93B0597320753c'Jed43085
bc5040404cd5b7e"

330 DATA "£21flfeO02O27O4cd5b7ef
B00201fOccd5b7ef e0O2O170cOccd5b7
ef e0020Oe3eC7328f 5c leO03e 1 lc 1 cd7
27ec9cl3a043be601fe012B5f78e6fBl
-f If lf4779B6fBH*'

340 DATA "530Blflf4f2l2d5blel97
e2323feff283e7eb8203a2b7e23b9203
42b2D36ffcd6b7a?a34£bcdO97B<'7320
75b234e23463e02328f5c3el2cd237a3
M0632Qf3cSel3cd' ,

350 DATA ■■6227237a3e0032Bf5c3e*
fcd237ac9231d97bb20b5c97Bc603eif
Qlf If lf477-?e<Sfeif If l+4^21Zd3blel
97e2323f e- f 28462b7e23b920407eb32
8093dbS28053c3c "

34.0 DrtTrt "S889bQ2O337732075b2j2
b36ff234e2346cd6b7a3a045bcd09733
e02328f5c3cl2cdi07a3e03328f5c3?l
Xrd 107*97329* 5c3ef 4 cd 1 07ac9231 d9

7tb20adc9210e5b"

370 DATA ,, 477&060ac57ef e002B292
34e23461e013elOcd727e79c604*ff»h
438062b2b3600180f 2b711eOO3e07328
■f 3c 3elOcd727e2tc 1232323 1 Occ2 !Oe5
bll2d5b060ac57e"

380 DATA ,, 4B72fe00202dlae6e0feB
0200d 1 31 3: 33e76bb30f 1 1 1 2d3b 18ec 1
31aa71717174M31aa71717l7c605471
33601 237 123702t2bcl 2323231 0c7c9c
d237a043c20013d"

390 DATA "71S4cd237a053dfefe2D0
13uc»e3c3d3f 3f ef f 2O0B1 lOOidiaiOe
d5b7b5ca7cbl7cbl7cb 17833001 145f 7
B«6t - cb 17cb 1 7cb I 74779e4 1 f ;b 17cb 1
7qbl74rcd227f 3e"

400 DATA "73518f5c77cd027fC6081
a 13772410+ af 1 d lc 1 el c9eSd5:3f 5063

221190O1101O3t?Ed5cScdb5O3=ldJ.ei2
3231 Of 3f 1 c 1 dl e lc9e5d5cSf 550C6O3c
506O0cd027fO6id"

4IO DATA "60977Bba20O-2323233«.0
023 1 Of 4= 1 Oc lOeflf lc 1 dl el c9»5d5c5+
5500600cd027f061d?abB20032323239
7bec4O17b36c02310efO=0600cd027'O
61d7ab820032323"

420 DATA " 59852397b BC^017b36332
310e+OcD60OcdO27f061d7ab82O03232
32397bec4017b360c2310ef f lcldleic
9f53e01320d5bf lc93e02bB20010c7B3
27c5b79327d5b06"

430 DATA "66041 921 2d5tc53a7c5bb
e203e234e23463eff cd237«ie5cdde7be
belOc79fel63B020e017^fe803010etoO
23d8047fe20200i4(b78fef f200146 7W^
b713a7d5bcb4728"

440 DATA ■'6248033d 1 80 13ccd237a2
b7eeeO377232323cl!0ble e f3t02be20O

20c0c73327c5b79327d5b2 1 2d5b06 : 9c
33a/cb3b»j:U4c234e23463effcdl07ae
5cdde73ebel7be6"

450 DATA "S448023d5f7aei023d577
BB34777824f 2Uft*OO2O014B7»fel62OO
14e237Bf e0020C 1 4678f e le200 146702
b712b3a7d5bcb4f28043d3d 18023c 3cc
di07a7coe0377cl "

460 DATA "SB9323232310a3c9f5c52
92929292S292929ed4b765c0901e5430
9sd£b735c0922765cc 1 f 1 c92lOB7c 1 1 2

d5b014sOC«dbOc9ff 1013ff OlOfff 070
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470 DATA "07e80Alrf)lC30JniOB0t0
1030601 02070204 1 b020bC B020a 1 60 1
914020b03020fC4020113020aOc02:00
f02090401100d01031101C21d0203l50
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480 DATA "18325bO14b00edbC97210
e5b061e7710fdc901030501030a01030
f 0103140 10319020504D2C50902050fO
205 1 5020E 1 aO 1 07050 1 070a0 1 070f 1
714010719020907"

490 DATA "369902090c 0209 1202091
7010bOa010cOf010bl432Cd09020dl50
10+ Of 21 cc7c 1 1 055b0 1 0500edbCed4b0
3Cble00i.iJaif7d97320d3bc , ?a77aO00OC'

097ed4D055bcd80"

500 DATA "74O17d3effcd807d3e01c
dQO7dEJ2i7d'?7b«ic0O232D202cd4bdSS
b6f7Bf900200a7dfe042BCS97cdS07dc
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dl«0O7dQ047Bd43"

510 DATA ,, 83990S5b=dSe7d7acd807
d97cd807dc9c5f301feafed78e610fe0
O200b01+ef ded78e6O2f»CO70f Rl I OOO
001fefeed78e61ffelf28C216f fOHe7
fed/Be61ffelf 28"

520 DATA "6l97O2160tflclc997bb2
8073e0732Bf 5c l8053eD2328- 5c97cda
C7d79c6084f3e02cdac7d79d6084fc9d
5c557f «0120063e0f B04716f * leOf cdS
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530 DATA "'1505blB3e3ef- t ba20030
Cl801041d97bb20e6cldlc9f5c5d5e52
a7bbc«/B/t)/HajOUJ24b+Gbddel7b32b
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60B-«7cd227f737a"

340 DATA ■ , 71B6B14+cdZ27-7378tJ60
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550 DATA "ti4027b2f 3677237a2fa67
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560 DATA "8094clf Ic9c5e5cd027f 4
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lc9f5c5d5e52a7b5c0787a7853OO1246
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570 DATA "7032cd227f73789247cd2
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5B0 DATA "71367eb277dd232b7ccl3
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5*?0 DATA "4042f01 f If lfBS6+7Be60
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OOOC0008080c040"

bOC DATA "6B294c4c5b7f7c79420S6
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610 DATA "599B0219252b292b25194
09ea4d494d4a49Blcle7effff7e78100
83c 7ef e7f 7« 1 c lB3c7ee7dbdbe77e3c3
C7ee7c3c3e77e3c000000 10101028101
O2B2B101O280OOO M

S2C DATA " 61 600C0024 181 82400000
Uic4ii4i:4^42^C(JOc3c324000024c3c30
07Beedbdfff7dOOOCle7do7fbffbe002
16clb095e2356237eb32836eb09d5e55
e23=6ebO?ebe 1 73"

/OLR COM : 'UTER, APRIL 1 984 1 23

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f P-T

omputer Graphics Language

t^ A.VERY POWERFUL, TRUE
p MULTITASK LANGUAGE
m AS FAST AS MACHINE CODE
if SIMPLER THAN BASIC

Write Machine Code in a
' fraction of the time currently
^required

I SCOPE is available from

most good quality
dealers and selected
branches of

WHSMTTH

4

\j details tff how to get

amespOblished

" contact

rket'mg

TECHNICAL SCOPE is a fully structured
DETAILS multitask language specifically

for writing graphics, animation and sound.
Being fully compatible with BASIC it is ideal for
writing both arcade and adventure style games.
Additionally, with SCOPE present in high memory
it can bfi used as an assembler with SCOPF words
as plain language mnemonics. Therefore no
knowledye of machine code is required.
The language is extremely easy to
comprehend and is very powerful >

indeed providing many features
not availablefrom BASIC.

SCOPE HAS TO BE USED
TO BE BELIEV ED

48K SPECTRUM

V F

BETTA BASIC

flfe?/^<

TlHS SET OF machlne-coce routines provides
the 16K ZX-81 with 14 new Basic statements
and commands usually found only on much
larger and more sxpensive machines. The
routines take tip I S36 bytes ir. a Rem
sutemen: and are designed for esse of use
with full errsr codes. Two of the routines are
interrupt driven and allow you to add your
own inte-rupt driven routines.

Tn t»nrer rhc progrrm, a )6K ZX-81 with
the New run ha; to be used, i; may tc possible
to use less memory, but some of the routines
will crash if the display tile is collapsed, te.,
RAM is less than j'tt.K.

First, line 1 Rem followed by 123 zeros —
four lines — is entered. This is then
duplicated as line 2 and so on up to line 10.
Wher. this has been done, the following are
entered as direct commands.

3 OKE 16611.56

POKE 16512,5

=>OKE 16509,0

=>OKE 16S10.0

3 OKE 16514,118

POKE 16515,118

1 REM BETTA BASIC

POKE 16419,1

NEW LINE
You should now have

I REM BETTA BASIC
on che screen. Anything else means that you
have probably done something wrong and it is

best to start again.

If all k well then enter the hex-loader
program 1, ignoring line (J as this should
already be in memory. Type Run N/L then
enter trie start address for the machine code
date, which will be 15514 if you are just
starling or another number T you are
continuing from another cay or after saving
warily completed data. You can now enter the
.-lexiderimal data, as many of rh<.' numbers ss
you Eke before pressing Newline, but
remembering no: to enter any of the spaces.
There is a check-sum r.umber after each line
af data which you can compare with the
:he;k-sum number on the screen, if ii is
different t.ien press S N/L and you can enter
the line that is wrong. By pressing Q N/L, you
:an break out of the pragram to save it.

Looking through data

Program 2 is for booking through the data
"or ;iny that is wrong. To use it, type Run 200
then enter the start address. Type G>nt aft;r
each screenlull.

If all the data is entered and correct, then
delete .ines 5 onwards and enter program 3.
Do not use New to delete the lir.es. The
program i; now finished and ready to use,
unless some bugs have escaped detection.

You must have Bstta Bceic pra&ent in the
computer before you start typing in your

program. In this way the machine code
routines are saved as you save your program
that usts then. Now, whenever ycu :ype
Run, the variables are initialised ready for
u;e.

INT: Switches on the interrupt routine by
Ranc USR Int to give the following
features:

TRACE ON by POKE TRN, 1 or pressing
N/L one 1 :ogetherj

MEMORY ON by ?OKE TRN, 2 or
p-essing N/L and 5;

MEM/TRACE OFF by POKE TRN, 3 or
pressing N/L and 2;

ROUTINE OF" bv pressing N/L and 3 or
Fast then Slow;

Break out of any piogiam — even machine
code — by pressing N/L and 4. This also
switches routine off;

TRACE SPEED by POKE LEN, r. where
n is the length of .he pause at each interrupt.
Initially 3;

USER ROUTINE Three bytes - USE,
LSE + 1 and USE + 2 — are set aside to add
to call to your own interrupt driven routine.
Initially all are NOPS. Make sure the routine
is Off by using Ffst followed by Slow before
you start Poking or a crash will occur as soon
as you Poke in the fiist number.

When u:ing the trace or memory lef:

(continued on nex; page)

PmgrArn 1.

1 REM 000000 ETC. . . ,

5 SOFOLL

PT 13,3.; "START 8DDRE5

i T r- i^^

ld& iMI-U: b

40 S0FOLL~

50 PRINT PT I9,0;X;

55 L '- i C =k?

30 F0F T-X TO X4-5

J- i i it *T" J*

THEM INPUT Ps

:-; 1 1£

_ a r-i £p ~* O 1 MCm I iL : 1%

34

IF hS = : 'S" THEN STOP

35

Ir LEU fi$/2<>INT iLEN

H ~ h •

p

THEi

i LST fi$=:""

S3

Ir H5 = : THEN GOTO 70

j- - |T|

L^T N=lb-rCODE Pf + HjiDF

Hg

s.

100

POKE T ,N

lie

LET C-sC*N

120

PRINT "' " ;fi=i TO 2) ;

J.d Z>

Lbs H*=P$ \3 TO )

'} *-;;.--

r-.l j- v" ;

— —* ■*»■

14.0

PRINT 1! , "' : ":

1 SCi

NEXT X

VUUH CJMfUI=H, AHHtL ia»4 12i>

(continued from previous page)

features, the number will take up the first five
:ha:aciers in :he top left corner ortru: screen.
These numbers are only printec up during
:he interrupt and the original text or graphics
iru pui back mto ths screen before control is
handed bsck to the ROM. So as far as the
ROM is concerned, the numbers do not even
ixist on the screen and so will not be "in the
way". But it is important not to use the
Sinclair acroli ctmmand 33 this will cause a
crash after 23 scrolls.

Pressing N.'L and 4 wit break out of any
machine ode programs as long as the routine
.s switched on by Rand USR Int

The Trace anc Memory Left routines will
automatically switch off when program
execution ends or any error accurs. though
they can operate in commend mode by using
M'L ar.d the function keys 1 to 5.

'ITic interrupt routine wilt be witched ciT
by any of the following: Fast, Copy, LPrir.t,
LList, Saw, Load, Pause, New or by entering
a line. If any of these are used then do not
forget to switch on again by using Rand USR
'nt before U3ing Trace :>r Memory Left,

LOG Tnis moves VARS up to Eline so that
all the variables temporarily disappear and

RS in Rep.

ERROR CCDE5.

2 variable not tojnd, eg.

Ptoc name etc
4 out cf rremory
R integer nut of 'ange, io a number

less than or greater than 65E35

has been used in a routine
C number error, ie a number or

expression has been left out or does

not maks sense so the computer

can not change It to an intege' for it

to use.

break

miss ng ;

too many repeats (max "7)

syntax erro', en no data or

expressions

miss ng

until without repeat

RJ error ec., F:$ ras been DIMed or

is too short so that Rep and Unt can

not use it.
W Rand too high for LST

Ptoc name error, eg loo short

(minimum thre= cnaracters or nor-

e>istant

incorrect string variaole in ine after

DYN

D
Q
R
S

T
U
V

X

"load variables" can be

used instead, .e., variable names

can be used for a second time without

altering any or the original variables 0:" values

VAR: Restores original variables after using
LOC. Do not use unless LOC nas been used
first. Fo" example

FANDUSR VAR.

SCL: Stands fur Scrcll. Do not use the
scroll provided by Sinclair as it wil. cause
some of the routines 10 crash. For example:
RAND USR SCL.

In the following, X and Y ctn be any
numuciiuil aig.uneui in the range to 05535,
V any numerical variable, 1 any nu.merica.
dummy var.able that is not used for anything
else, anything surrounded by [| :s optional, al.
P-int ststernems will be changed to Reir. by
(he i3ut.ni;. and bliuuld be changed back to
Print if evet the line is edited. The Print l.nes
after the USR lines hold the arguments for
each routine.

Funclion has three uses

PRT: This has three uses, two of which are
concerned with the ports.
;i) OUT (pert), bv.e. For example:
10 LET 1 = USR>RT
20 PRINT X, Y (: X, Y 1

b) IN variable, (port) or LET variable = IN
(port). For example:

10 LET I = USR PRT

20 PRINT; X wiers X = pot to 256

c) LD I, X. For example:
10 LET I = USR PRT

20 PRINT; X wner* X = char set tc 255
This one changes the character jet and can be
med for games or with 1 graphic* RO.V. —
initia.ly 30.

RHP: Same as BBC Basic Repeat. The line
numbers are stored in RS. Up to 15 Repeats
can b^ nested — inside each other — before an
error occurs. For example:

Program

2

± '— '■• 03

1ST OP

J—' iSi *St

w— -r- 1_ ^ j -* i *_ . 1 ■ — * f- % . 1 — j ry ; .* f—. r ~ .^ .^t ^

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2£8

P O R X = X TO- L~?~? '—■ 3 S^~ i^ *-' "?

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'■—■ 11 kS

10 LET I = USR REP

UNT; BBC Basic Until. Jumps back to line
after last Rep. 'S a testable condition is not
true. For example.
10 LET I = USR UNT
20 PRINT testable condition

O.VC?.- Sarr.c ae On . . . Go To . . . Jumps to
the Xth line number in a l.st of numbers. If X
= or X > number of numoers in lis: then
the line after :hc ON'G is executed. For

example:

10 LET 1 ^ USR ONG

20 PRINT X; lire [.tire...:

Up to 255 lines can be put on the list.

PRC: Def Proc. This is a s.mUation of
procecures, using names instead of line
numbers. F,a"h 'proceenre' has rhp fnlKwing
structure:

10REVI PROCNAME
20 Subrojtine or procedure
30 RETURN

where Name will be :he name of the
procecurt. TRC is callec only once at the
beginr.inc of the program. For example:
-0LETI = USR PRC

The routine then searche; for all the 'Rem
Procname"s and puts the names into the
variab.es area with ;heir line numbers so that
a procedure can be called bv:
GOSUBNAME
The name mist be three or more characters
long and contain only characters bga. as a
variab.e narr.e, see page 38 of the Sinclair
manual. There is no space between the Fioc
and the Name.

DYN; Dynamic procedure, '-"his routine
tells you whether a name hdda string variable
is a procedure or not jo that it may be used
with VAL without an error occur. ng. If it
does not exist, eg.,
10 INPUT A3

20 IF USR Dm THEN GOTO VAL AS
30 nCM AS
40 GOTO 10

The above example Gmos z procedure
entered in line 10 if it exists, otherwise it waits
for you tc enter another. The AS in lirus 10,
20 and 30 ca.i be changed to *ny other scring
variable.

LST This is a fast scrol.ing list with a few
extra fcalurev To use:
Rand line to list frcm Rard USR LST
In thin ro nine you can pr:ss:
Space to bretk out of the routine;
Z to copy the screen tc the printer;
K to "normal list" the last line on the screen
in order to edit;
D to list through slowly;

(continued on page 131)

26 v OUR C3MPUT=R. APRIL 1984

#

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SCOTT ADAMS ADVENTURES
AN OVERVIEW

By definnon an adventure is a dangerous
or risky undertaking, a novol, occting, or
otherwise remarkab.e event or 2xp2rience
On your personal csmputcr, adventure is

Itvat and more.

Playing any of the Adventure series con-
sists of three elements: you, the user, the
gomes themselves: and the authcr, Scot-.
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If you're tired of video games, of bouncing
bolls or shooting targets if s,ou\« ready for
an Intellectual challenge that transports
you to new worlds of experience; if you
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1. ADVENTURELAND Wander

through an enchanted realm and tiy to
uncover the 13 los p . treasures. There are
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D.fficulty Level: Moderate,

2. PIRATE ADVENTURE - Only by

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Difficulty LgvgI: Advanced

4. VOODOO CASTLE - The Count has

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hiiu by hiieiieiiiKs. ITieitilKilieb, witliyou

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Difficulty Level: Moderate.

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HOW MUCH USEABLE MEMORY YOU GET

HOW LITTLE USEABLE MEMORY YOU GET .

■ I" you iaw a computer labeled 32K, 48K or 64K you'd assume
it had a large memory. Rghr?

Wrong. Those figures bear little relationship to the actual
amount of useable memory left oice the computer is performing
functions like text, colour, sound and even more importantly, high
resolution graphics.

Thp Commodore, for instance, claims an "elephantine" 64K
mennory, yet uses up 26K producing high resol jtion graphics.

Under the snme conditions the Dragor 32K leaves 24K of
useab e memory, the Lynx 43K fust 14K.

And the BBC Micro and Acorn Clecti 01 1 leave I ie apsr ulor
a miserly 9K to play with.

Howeve-, there is one computer specificclly designed to
cope with these normal working functions as a matter of course.

The new Oric Atmos 48K.

Wiy, even when you add peripherals like the new micro
disc drive unit and colour prinler 'see technical details overleaf),
its useable memory is never less than a healthy 37K.

Wnich not only eaten for all the standard applications
you'd exped from any home computer, bjt also for advanced

WITH THE NEW ORIC ATMOS.-

WITH OTHER HOME COMPUTERS.

programming and ^ery sophisticated games.

Tulkii iy uf yLn iti, ihe new Oi it Al mob slur i s yf f wit'i a major
advantage over most new computers, since it takes most of -he
sofiwcre already written for the Oric-1.

And Ike the Oric-I, it has a powerful lojd<peaker and
amplifier inside its case.

The seme unit, h fact, that prompted Which Micro"
(November) 1o quote... "At fjll volume this machine can compete
with most arcade games. Its sound facilities have rrore in common
with tfie £400 Beeb, than the rather pathetic beep of the Spectrum.."

Vet the Oric Atmos 48K costs a modest £170, including all
the leads anc adaptors
you need to get it gcing.

Eul lien wha"
else would you expect
from a British Company
recognised for offer ng
sc much for so little?

The new Oric Atmos 48K. 0RIC

. m -^ f. a .»d ej *u> fetf *i

IMfeMMfcMMMMMMMM

-w*

Now we've whetted your appetite,
here's something to get your teeth into.

Printer

Atmos

Technical Specifications Technical Specifications

Micro Disc
Technical Specifications

Prnter/
Plotting

system

Plotting speed:

(honzontal)

(vertical)

Prnter

Speed

Resolution
Effective
plotting
range
Charade's
per line
Character
per line'

Accuracy
repetition)
movement)
d stance]

Pen life

Pcmllel
interface

Temperature
range

storage

Humidity
range

Pcwer

simply

Dimensions

Ball Point Pen, 4 colour

52 mm/sec (2.05ipsl
73 mm/sec (3.08ips)
1 9 rhnrnrtfir? per second

12 mm/step (0.00787 inch)
?6 mm (3.804 inch( x axis,
divided into 480 steps (No limit
in y direction)

30 or 40 text nrode (determined
ay software in graphics rrode)
INT(480/n+i:*4)
for0=n=15

12nnmmax
3.3 mm max
15% max 'x-axis)
l%(y-axis)

250 metres (825 feet)

3- bit parallel Uses STROBE

anc ACKNOWLEDGE

18.3lu35X{65lo96T)
-40to7]°C(.40tcl60°F)

1 0%to80% relative non-
:ordersing

Switching power supply inpir

im-i?nvAC

200- 240 VAC

103V wicls

S 7 /tr'deep
2V?' high

C 3 U 6502 A

rVemory Choice of 1 6K or 48K RA\A

Memory Minim jm 48K RAM, ma> 64

(48K Model) InK ROrvWernal control
signals allow jse of full 64K
RAM cr maybe used externally
to increase ROM'RAM

Language Extended Mieosoft basic

Keyboard Typewn'ter style and pitch. 57

keys, standard computer layout,
add iticna I cursor control keys,
autarepeat facility,tadileand
acousfc feedback

Display Oitpu - for B&W or colour TV,

RGR output for rdou" monitor.

Text format 40inex28rows

Cnarader Similarto~eletextformat

set standard ASCII doube height,

flashing, 80 user definable

characters

Graphics 240x200, 3 colours

Graphic Points,lines,circlcs

Facilries

Sound Internal loudspeakerand

amplifier.3-Cnannel sound

synthesiser envelope control.

amplitudecortro! 8 odaves,

noise enamel
Storage Most cassette recorders via

DIN socket 300or2400 EAUD.

Disc Drive.
Interface Centronics, exparsion port,

Hi-fi, RGBMonitcr,UHF TV,

cassette recorder

Other Wcrrrresettoregaincortrol

withou - clearing program or
data

1 60 K bytes per s ide (dou b b
dsnsityasstandDrdl

40 (80 available as option at a

future dcte)

16

: ormatted
Capacity

^o.of
Tracks
No. of
Sectors

Bytes per 256

Sector

Transfer 250K Bits/Sec

Rate

Supports up to599 files per side, -our dri^essingle
nr dpi. We sided, 40 or80 *rack. User def noble
con : igurotion allows mixing of drive types
including 5 '/i" (five and aquarter inch)
Extensile wild card facilities
Copy a lows rrercingof bascard machine
cods fibs
Utilities

The Utilities ore asfolbws:
l.Boccijp Cipyn wfinerlkr

2. Copy Copy a file to another

3. Del Delete a fileallcwirgwildcarcs

4. Dir Display directory listing

5. Drv Set the default d'ivenunber

6. Format Format end niliuliieu diic

7. Load Load a file (code dda or basic)

8. Proled Charge oro-ed status cf file

9. Recall Reca I a base array from a file

10. Ren Rename a fib

1 1 . Save Save a fib (code, data or basic)

12. Store Slorea basic array as adaa fi e

1 3. Syo Gnangc system configuration

Pric*s e."d doii correct d limcot goino to press.
Sp«cifcffiC*issnfiwcibcveir.5cc5rrovcarge , .vltiojiuV :v.

Available at Dixons,Laskys, Comet, Wigfal!s,Rumbelows and all good computer stockists.

^

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(continued from page 126)
N/L to list through fat.
USEFUL ROM RCUVNES USED:

08F5h PRINT AT B.C;

rmnRn PRINT CHR$(A); Chars 0o3 and

thsir inverses
0948h PRINT CHRS(A); Chars 64-127 and

192 255

0A9gh
OAZAh
OWEh

0369h
1520h

PRINT BC;
CLS

LIST

COPY
STK BC

Same a Dressing
Newl ne

0EA7h UNSTK BC

111Ch LOOKVARS

Puts BCon cac
stack as "floating
point" nunmer
Takes BC off calc.
stack

Finds variable
pointed to by CH-
ADD and puts its
acdress into HL

If you wish to disassemble the routines,
then heie are the addresses you will nceJ in
hixadecmal:

40A5
40 3C

40CD
40DC
40EE
4108
420 E

4227
4270
4?=1A
430D

INT

LOC

VAR

3CL

Systsm variables

Interrupt Routine Entry Po:nt

Houtine to cnecK next line is a

print line and change it to a Rem if

necessary.

PRT 436Z DYN

REP 43EE PRC

UNIT 44A6 LST

ONG 4585 asl address

If the task
of tvpiitR

program is a bit dauntirg,
then send £3.00 to the following
bdd.ex) and 1 will >end yuu ii copy u." ilic
finished program on tape: J D Judge, 147
Hesters Way Rofd, Chelteiham, Gloucester-
shirs, GL51 CSD.

Hex dump and checksums

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allow limit odiniry mono cassette
rtcoiftnrti in br us'id i&llh the Vic 20
«KJC«onr«Klctc6<C10.9&|£1 1) C*3.

B ii i ii :i.i:i:.ir.-: CBSjet:* ccrvcrur
- criiripa it>k; cassette ificoide 1 t"7

■ i 3S i £44. Curnrnoaoie casstrl i;
'ico'cfei 143 (£4*) t'iC Ceiuoiites
:>i"ite inteit;i;i-;; toi Vc-20 aid
Csmrrodoie 64 MS :'44l .'50 1541

Disc drive* I"? 33 I £209; i/M 1£^b
Printer i235 IC220 CMh 1 526
Printer £350 lf/330> £300.

ACORN COMPUTERS

Ccclron £203 t 2C9I £229. tBC
MuUj E C404 It :i'H> C-iOS. 14

Colojr nonitoi C228 n 229) £3ift
Kent* double dfnsiti :l>sk interfice
5V*t«m lor 02eb £13S til 25 £13b
vV<: .il uk »r>a whele idii^jc ut Cuinrtliu

2iac diiws tor trie Siaeb e.g KOK
iincifc £230 ^2201 £2-"-0 Douale 5 x
40OK £625 :t-560i ££80

PRINTERS

Epjon flXOO C30C l£2''1| tHOa. Eyw...,
RXBOr.T C34B !£31G C3-IH. -nnmvg
CTI cpuo C2?5 'C213I £-'-1H I :iv.r
txaC U^O f£408> £438. Fpson
MX10O/3 CAS1 t£16GI £aOR. Oki
M'CKlmc 80 l2 1 3 ICI97! i'llH Oki
Micrctme 84 CB31. Tbe U»a 21
(onlaned iloisv ivheal aid jlirr.trii:
ivnowr.r*' fd^P IC415! C4<t;. n.i,
tio:r>5' E'22 combines ntatrix pun ci
4nd ?lect>c f.-pew-iter CI73 l£t€6)
£186 Ji.ki C100 p.-cportona ilatsy
wneel Mfnui H-TA IT414I f4?d
MCP40 coloir orintci d34 |£1i3;
(140. Sar 3TXJ0 Ihormal pun nr
(158 i£W3> £163 tnerfsces to run
no jome ci inters 'rem Vc aid
Comhodcre £4 £45 £44i £50 V/e
.r :jpDt/ intirloces ti run the above
: niu<rt-i Irorr Sni-p comiiuters £58
It H7I t hi-

Addr^i

Tel

STANLEY ELECTRONICS

The Compute- Export Specialists.

Oept YC, 32 Goltlsel Re. Swanlev, Ken: 8R8 8EZ. England.

Tel: SWANLEY (0322) 64851
ho\tw>g r?/jr.-i topay A I twites .ve mciuswe. UK un-es are thowii <<si ana in :■■•■■•,■
fior.i ..ml VA T. The second price in back.ua n for export customers m Ejiop.r .tint

tf^t't/K*^ mvytrctt P>t mj-t ^HJ.:r;i<"/**. 7"^^ W*nV f.t*cc 'J fir BHpQIt CUAfVlfWa iJliltlfttC

£jroi:- ,!■■. .'■..••. '■; Austnlia t?ltr.r inti trcitiaes iiwnr! atmaitoosttfe. Officii! C/fteri
Keicone

1 32 YOUR COMPLTEA. A^RIl. 1 984

LABY

Enter the depths with
Paul Hadlerand his Vic-20.

Thin PROGRAM WAS inspired fcy a program 1
had a game of cue dark und chilly winter
evening las ; year. The aim of that gams was K>
make your way through a plan of a maze
randomly chosen by die compuer in as shoit
a line is possible. Poir.ts were awarded for
speed cod agility around the tnazj. This led
mc to siart work on a game which would be
displayed in ihree dimensions visually on the
s:reen so as to give the impression of actually
walking the corridors of the Inbyr.nth. It
would alsc hove extra features to help u
hopelessly lost computer games addict reach
trie exit.

The program itself runs on a Vic-20 with
16K memory expansion and I musi say takes a
fair old time to load Iron the faithful cassette
unit of the Vic-20.

As with some oche: programs, t:ierc are no
Fuss and bother items before loading the
program with Peeks and Pokes cr anything
cl3c for that matter. Ju3t simply run cho
program once loaded into the compuer and
let it dc the work.

Once loaded and ran the program will ask
for vertical and horizontal dimensions of the

ma>:c > ihe maximum 3ir.C3 of which arc 18 bv
18 cells. The computer will then build the
maze starting with a ra.idom entry point in
the south vval.. On completion of the maze
build the user is then required to s.ate if he or
she would ike to sec a two dimensional view
of the maze.
The program then draws up on the screen a
icontinjea on pacie 135)

19 *?!♦+♦«♦*«*♦«♦♦♦

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me ffe.*«iF jj >fKE exii if Ketessf***

(listing contini.ad on nac,n J3i>,

YOUR SOMPUTEa APRIL 1 0S4 1 33

A COMPUTER BREAK DOWN.
OR A COMPUTER BACK-UP?

WITH A MICROCARE WARRANTY **^cj*

Some of the small print with 3 MiCROC are warranty : \

1. YDuna/sendvojrcomDuterin^orreDairasafrpnaqrprp^ary ^.^
curing me warranty period.

2. Your computer receives e> pert attention anc ca'e.

3. After repair it is thoroughly tested and returned as oromptlv as
possioie.

4. iVicroCares liability extencs to the rspair of electronic faults induces
all part?, or reolacemert o E the compiler if found to be irreparable.
Yuu'i e [jui tiiabiny an extra 12 months peace ot mina ... at very l ttle

cost Just mink: no reed to sea p your cornpL ter if it goes wrong after
the enc of guarantee ... no hgssie with manufacturers . . . no problem
with finding someone capable o" proressiuivl repairs.

With a MICROCARE WARRAMYyou can have your squipment up and
r jnning in days — not weeks! And there's no limit on the number of
rcpeirsduring the warranty period!

So if you own a popular computer, there's a MICROCARE warranty
thats righ: for your machine, why not buy a years peace of mind now?
The sooner you do, the cheaper it could be

write today, cr pione your Access /Barciavca'd number, meres no
need to have 3 b *ea<down if your computer orcaks dewr. with
micpocare you ii always nave professional oack-jp!

microCare

SCHEME A

SCHEME B

SCHEME C

_^\

Cast of 12

Cost Of 12

Cost Of 12

months

months

months

warranty if

warrarty i-

warranty IFj

less than 90

tiore than^O

i: niu ■ [

days oia

days old

tacturers >

\

juarznteeha;

Model

expired.

Spectrum

C12.90

C18.30

CI5.00

£22.40

ZXB1

£9.50

£13.90

£19.90

£15.50

Atari 100

£11.90

121 90

£?9 90

J25.30

Atari BOO

£11.90

£21.90

£29.90

?25 30

br: a

Fia<v>

-'71 DO

09.90

sas.90

bs:b

£1190

£21.90

£29.30

t25.90

Ccmm>xioreVio20

EH 90

£2190

£29.90

£25.30

Conmodorc C€4

El 1.90

£21.90

£29 90

£25.90

Dr3gor

E12.90

£1890

£25.90

£22.30

Acorn tiectron

E 10.90

£21.90

£29.90

£21.90

Ore

£12 90

■ £18.90

£25.90

E22.30

Comex35

E12.9D

£18 90

£25.90

C22.J0

lynx

E 12.90

£18.90

£25.90

t??.90

Slr'iK

£12.00

MQ90

E2D.90

£22.30

Jupiter AM

£12.90

£18.90

£25.90

£22.50

Texas Ti 99.0a

£1290

£18.90

£25.90

£22,50

F

9 Thane works, Thane villas, London N7 7PH. Tel: 01-609 7919

Pitasesendme

warrarty ■' warranties fcrscnerns/s .
fcrconouer.-s model- s

91 9|

sariai rumbc-r 'c

i cncicic cheats for

drl would l*e to oavov Access or B;rcU-/car:J
and te-itermy lumber and signature acrorcingly

Naite Occupation

Acdreis

. made out tdmicoCiTc.

Signature Dats

Please iot€ that if vou ire aoplying -or warrantYimder scheme Aor B.
please encase :he original manufacture's warranty irw line returned with
r MicroCarewarranty.

Please add C1. 50 P ft P.

134 YDUfl COMPUTER, APHL 1984

I Plea

| VQ"

2

(continued from page 1 33)
ihree dimensiDnal reprcsentatian of the maze
o! whichever way you are lacing lo the mazs.
You then proceed into and around the mc.ze to
hop:*fn ly wmrh far the wry nit

To manouvre youisel;' around the maze use
ihe following control keys:
L — Left tjrn; K — Kigit turn; F — Forward;
A — Asout turn.

If you should find your quest for the exit is
not progressing as fail as you would l.ke there
is another comrmnd which has been
inccrponed into the program for your
assistar.ee. This command is called Help and

is furrhrr Subdivided intn rnmrraTwk wlnrh

will tell you ceitain informa:ior. abou: the
maze. Bui, before a description of each
command is given a word in yrjur eai. In this
command — Help — a tmthful account of
vour position and general status is net always

given, so beware, or you would be lei up the
garden path. Sony.

"ihe help commands are H followed by:
X — This may give you your current position
in the maze.

D — This jjives you a distance in moves to the
exit.

i> — For a suggested next move — very
dod^y.

At this point I world 'ike co point out that a
wrong move — or suggested wrong move —
may cause you tc fall out of the maze if lurk-
ing around (he S'art position in the ma*e; so
be careful. And fina.ly:
? — For a plan of the maze.

To g,*t nut of the Help routine anc back to
the maie display type I.

Lines

I0C-2S0 Begin the maze bjild.

40C-440 Random entry point i < south

wall.
50C-570 Find allowed direction for next

move.
60C-7S0 Chosse diractbn of motion
90C-9CO Move north.
IOCO-1040 Make exit in north wall.
11 CO- 11 50 Move east

1200-1250 Move KDu-t-i.
13CO-1340 Move west.

i :.••-•=■.■.:::

1400-1470 ir build jornplete make exit if
necessary. Put player at start
position.

Begin new maze build.
Code complete in'orrnation
about each cell in arrav P X. v t.

2200-2290 Determine direction through
maze

Display dopth 1.
Display depth 2.

1500 1560
1600-2190

260O-2820
30003220

340O-^6;O Display depth 3.

38004020 3ifiptay depth"-*

5000 6690 Accepi commands and execute

end games.

6800-6870 Another game.

6900-6960 ndex to next cell.

7000-7260 Calculate L, R and F.

7300-7460 Subroutines.

7500-7610 Determine direction ol next
TIOVG.

(listing "ontinued fraTi page 133)

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YOUR COMPUTER, APRIL 1 984 135

(ti&iitty vutuinued from previous page)

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36 YOUR COMPUTER. APRIL 1984

. At last the first joystick that puts the firing button
where it should have been in the first place.

THE TOP

AMERICAN

JOYSTICK

IS NOW

AVAILABLE ^r

INTHEU.K.... icufrfi

Extra responsive
actio*

Tnggei jA
Fre M
Button

Diamond

Cut 'Arcade'

Style Grip

w/m

Extra long'
4 ft Cord

l^FfiSPECTRUM

vi\ly±_ /y t99+£150P+P

• Including Interface to plug straight into the Spectrum.

• The first Joystick to give you "Arcade" feel and control.

• "Jet Style" heavy duty, diamond cut grip.

• Fire Trigger placed under your index finger . . . the finger with the fastest
reflex action.

• Self centreing, 360 n action.

• Compatible with most of the latest Software including:

Rubber
Suction

\ Cups for
One Hani Operation

J rVanic Miner

I Jetpuck
J Coohe
3PSSST

] Tsneoate

3 SO Tunmf
J Cosmos
Q Cyber Rats

i l Qttfutidiis
I I Spookyr.ian

J Slippery Sid

SS Enterprise

1 \Nitn Flint
I.J Meteor jiifs
I I Gwpman

Cosrrnc Gueriki
Z Kong

AsmOfftddOfl
'_ Minion impossible
D Aik Atak

Bruin Doiroge
□ Last St/nset. . .

H/htemm
. . titiaxms
ZE7X

D Fieniy

I Astroblaster
i Knot in 20

II JOUit

Spectres

LI Jcimun

liansim

I frcgger

Robo'ics

1 Blind Alley

_ Armageddon

l (jffactic

txtermmator

Jxlbrtak

Detective

NOTE: THIS IS ONLY A SMALL SELECTION OF THE MANY COMPATIBLE GAMES

Also available for Commodore /Atari 7 BBC/

SPEECH
SYNTHESIZER
WITH BUILT
IN JOYSTICK
INTERFACE

FOR THE SPECTRUM

Simply plug Into an exciting new world of computer speech synthesis.
Latest State of the Art Electronics. • Uses the Allophone system.
Produces any word or phrase from an unlimited vocabulary.
Speaks directly through TV speaker.

Also Amplifies Spectrums own sound through TV speakerl
Built in Joystick Interface accepts any Atari type joystick for full
games control. (Kempston compatible).
Complete with Demo Cassette. • Full Instructions.

L Triga Connrriand Spestrun £19.99

L Triga Com rnanc Atari £12.99

D Triga Commanc CDmmodore £12.99

'. Triga Command BBC £19.99

r Vox Box, Spectrum £29.99

r Vox Bex andTriga Command £39.99

TRA DE ENQ UIRIES WEL COME

UNfTR. FFNTON INDUSTRIAL ESTATE,

DEWSBVRY ROAD. FENTON,

faMuiMP STOKE-ON-TRENT

K VW5W3 TEL: 0782 273875

allow 7 days Postage Please A dd £1.50

24 HR CREDIT
CARD LINE

The very latest

RVf

from Spectrum

PRINTER

inexpensive
quality printer
for the BBC'R'

Just look at our fantastic low price on this super
Dot Matri* printer! The idea! machine for the home
user, the Bit Printer combines practicality with low
cost - now you can list prog-ams for debugging
without spending a three-figure sum

The Bit Printer interfaces directly with the BBC
'B' and you can see it at your lecai Spectrum
dealer now!

SPECTRUM
PRICE ONLY

89*

Now available!

COMPUTAPE

115 Reef to reel cassettes for

jnder £1 - see your local
SPECTRUM dealer ; or details.

FwUstfc Vdue frim 5 j*ctium!

SUPER-SAVER

CASSETTE RECORDER

For COMMODORE !>4 &

vic-20 ONLY £39.95

LATEST

• For up to date ncwi, information
h often iro.Ti SPECTRUM ■ »ce P«S-
iti ;i.\^r gooir i or r-, n dt tails

COMPUTER
DEALERS

(o- proipcctivc Comjute- deilcisU
i()Ou moulUlikc [•j kiuw mutt jtMiui
becoming * SPECTRUM APPOINTED
OEALEr. on an exclusive area bail 1 ,
please write to MKE STERN or
DUCUEV LAMCMtAD Sp.rtrum <U»

Ltd.. Bjrrowfleld, Welwjn Oirdci
City. **rts. or Telephone (0707:))
W6\

UP TO £1,000

Instant Credit

With your Spectrum
Chargecard

ctrum

CHARGE CARD

• There's up to £1,00) worth of
Instant Credit ivailableon 1 Spec-
ttum Chargecard Sec you- local
i'fcC RUM dealer lor written
details (UK mainland only) Typical
APR - 30.€' r /o

Another first from

SPECTRUM!
Introducing the exciting new

ORIC

ATM OS

■ Lots of exciting programs
available

■ Bu It-m certronics printer
interface (no RS232 needed - just
plug in your printer)

■ Full-featured keyboard with

sculptured keys

■ Seperate keys for cursor
control

■ Built-in speaker

■ Special sounc effects for
game programmers

HtKt'5 ANUIHfcR FANTASTIC FIRST IN HOME MICROS FROM SPECTRUM thebrand new
and tremendously exciting OfclC ATMOS 48K computer!

The ATMOS his tiken a emarkable step forward in home corrputer technology. But
how?

Most Micros 'waste' a Urge amount of memory on cpenting functions like graphics, colour
and scund. Oric saw tiat ay running these tasks from a ROM menory. a tuge amount of (he
ATMW'r. valuable 40h ram capacity iuuU In- fit-.-d Ijf more advanced operations.

So the colour capability (8 graphics, 8 background), powerful sound lynthesi: and high-
resolution graphics of Ihe ATMOS are achieved with fewer demand; on computing power than

itc conpalitorv,

So what else makes the ATMOS sc exciting? Tiere's now > typewriter-style full-response
keyboard, it's directly compatible with most dorrestic cassette players; and there's a wide
choice of software The AT.WfK i<. designed torconv ioniance, too - it utes extended MicosoH
BASIC yoLr pr ntc plugs in without anRS232; and is comes complete with leadsand everything
yoj need to get going

We've i 4-COlour Oric prin:er (which accepts normal pap#»r> a- a terrific valuefor-money
price. >oon. a I'" Microdisc Dri/e will be availaale, too, to complete the system. Take a look at
the suserb ne«v ORIC ATMOS. in its highly distinctive bl.irk-.md- ed rim, at youi Spectrum
dealer NOW!

SPECTRUM PRICE

N

i i

Ba

Spectrum CcmpLtcr Lcnlr-i h-ive no connviim whatjoevc with \H? Z>. 5 p- < t rum Computer n\.ntihiiiifi(J b> Sin flair Research Lie.

:;Q-0'

- ■- ■■:

Now from Spectrum - a

complete business computer

system for under £900

COMMODORE 64

BUSINESS PACKAGE

■ Eicrenrely simple to jse - no
computer experience required

■ Complete & ready to run with
Sales/Invoicing & purchase ledger
programs- ■ Compete end-of-
month reports at tie touch of a but-
ton - Including Cedi'.ors.'Debtor;
lists bales & cish lists, statemfnts.
VAT btlan-es rtc.

Include ■ COMMODORE 64

■ DISK DRIVE ■ COLOUR
MONITOR ■ COMMODORE

PRINTER ■ PURCHASE L:DCFR

PROGRAM ■ SUES LEDGER

PROGRAM

■ :AS V SCRIPT PROG'tAM
Plus! ■ FREE! GAMES DISK WITH

SIX GAVtES

FROM ONLY

Just Arriving! It's the new, superb
COMMODORE SX64 PORTABLE

EIG NEWS from Spectium -

'.lock j trc uit arriving of tht

incredible lew Commodore

SX 64 Portable Colour Com

puler - a dream come true la

the travelling executive! Thii

superb, compar. Micro incoi-

poiates all ol the lop-scllinj;

Commodore 6''c luncbotii

and features a detachable

full function keytoarc

plus built in colour

monitoi Atsr> s ngie

dis< drive. Wc'rcvery

excited - you cm set

it at yocr lo:al Spec

trun dealer now!

SPECTRUM PRICE

FREEt FREE! FREE!

• FREE with each SX64 Portable tire*
supers program*. - Easy Scipt. Future
Finance and Easy Stock.

COMMODORE VIC-20

SLper Value

STARTER

PACK

Acomplet? Heme
Compjter tytlem
including the VIC-
2C Compjter a
Casselte Unit, int-
roduction to BASIC

p;rt 1 -,i nni|)Ii' expansion of
computer programs - Blitz, ~ype A-
Tcne. Race & Koppit. A fantastic
deal!! and great viluefor-nonsy

Ul*. HURRY! ofl*i only while
stocks last

SPECTRUM PRICE

99

139

Also available:

VIC-20 £99,95

Including 4 FREE ROM GAMES

For the

COMMODORE 64

HOME USER

VIC 1520 Printer Pbtttr £99.99

COMMODORE 64 with 4 FREE

GAMES £199.99

SINGLE DISK DRIV= f 230 .00

AZTEC Cent'onics Interface £29.50

VISCOUNT Cassette Interface.. . £12.95
Flus! 100's of Software Titles now
available.

Commodore

VIC-20. SOFTWARE PACKS

at H/^LF PRICE

• Multpackl Cmeea (JO:. Voodiior.ivlr ("mmrrimfh
Avenger • MuUn.uk J- Cor, AtivenlurelantJ, K.iiJ on Fort
Km i Mole Attack • MuHpaek 3: Sjrgor Chess. Tre Count.
Mission Impuisiblr, Cosflk Cruncher. • Vtultip.tct 4:
Saijun <tit-j:, Piute Cuvr, Kjt «.i(.c. Super Lanaer • Mul-
tip^ck 5: Cmrgs Rtcc. The Coml, Menigrrr. Mole
At Licit

iacli
Pack

Only

£19.98

WMILt

stock:

LAST

COMMODORE 64
HOME ENTERTAINMENT

Package

SAVE £50

ncludes: COMMODOFE 64. COMPATIBLE

CASiETTE FECORDER, CASSETTE WITH £

GAMES. ZETA CRACKSHOT JOYSTICK

(Nwrnil Total Price £290.30>

SPECIAL
PRICE

£239.95

All these items cat als> be purdiase i seperattly ■
wc your local Sprctru-n dealer

commodore Just Arri vine! Arr-cccnmcc

1520 PRINTER COMMODORE 1516 «»WHW1"H

• PLOTTER printfr FOR COMMODORE

LIL

The 1SJ0 ^*-

..nit- plotlcr draws
in 4 coiouiv and prints
characters .nil rumtcfv

£99.99

IK

'&&**-

Supert Dot Matrix (near
letter quality printer)

£345.00

'i'couit Cassette

Interface £1255

Ai.ih.num 42 Printer with vie

2C interface £99 90

Stick Jght Pen £28 75

PIjsSO 16K RAM ...£37 99
Vi;count€4K W.. .£69 95
4 Slot Mothcfboifd.£2495
Adman Chatterbox. . . £4995
Stonechip 16K swrtch^hle
RAM £3495

Turn the page for more super
offers from Spectrum ♦ • .

Not ill '.torn tarry etery idvcrttltd ittm. neut ptione inK ■ e nu<ii«K . luurncr pritct cor ■ .^.i at time ot iroine to prcn r*Uc

The Top SO

TITLES

Selected by Britain's leading Software Distributor

MICRO DEALER UK

3-0 •'■•.: Attack
Aliliern it
Revenge a'
Mutant Camels

Drain Cb-i-.r
Flrhter Pilot

WlM-lif

Mi Wimpy

Rommels

Revenge

Hi vet ti>w?i
Q later 64
C.Any 64
Luiat Jetmat

Hmlf Kilit-

Zzoom

KriVAIOi

lei Pjl
SoobuDive

Cray Billoons

Micro Meji Sptctrum

l}l£lt..| C.p,r+rHm

•nlcrosphe eSpictrum
Spectrum
Spectrum

CrysUl

ItamaiDft

'/oyaaer

Aniroj

Ultimate

Prote'<

Imagine

Abbet

Ultlmite

Durrell'

SAnrtrk

Software
rro|erts

LrylLl

lulls u! ire

FhngS

Speed Duel

Valhalla

llcrace and thehfon

i ■-- - — r -

Kill O+l Ivbbfcb

fmi C.D.5

CRM 64

CUM 64

Spcct'un

Speitrun

Spectrun

SjMctnin

Spectrun
Spectrun

CBM 64 £7.91

Spn-trun C7.f0

£4.9 J

tr.oi

£1.9 J
M.90
M.ID

ft/. JO
£1.99
£7.9f
Cf.50

a.so

£J.9J

ts.so
ti.to

DK Ionics Spsctrun

legend Spectrun

Spectrun

(Ti" <

Spectiun

CI.9J
£14.91

CJ.vS

£*.»*
0.91

Andreirf T%0

1tv.ii -t (I BOJyCrystal

Snatch rirt

f»t Pic (VIC) Ult null

Lunar Craks Mitfomrga

Arcacia64 Imiginc

Huncibacc 64 Octan

vlicrxbot Sorrk

Vletaja jdi e Lljiruiu t

Llamas

Miiiics UK Tronic!

stunfaeis Imagine

rh^ rirt.j;. (tin I mi

Mini e Control Cemni
Jrbaa Upitart

'..C 20
a^ectmin
COM M
CBM 64
Spectium

view

CJ.IO

coas-
ts. so

£J.»f

£«.)0

3lidsand ;he
seev
>«sh Offl

Twin Kingdom

Valley

"m ir Sin. -

Thrusra

Kil ur-

ShepherJ

Bus Byte

Sul.wair
Projects
Bus Bytr

Arte
Sofcwarr.
Proerts
Super pipeline Taskset
Aik l» see lh*u \up-r tit es
ifeale' NOW!

Speetium £5.) 5

Spectsum CJ.I0

Sf>«ctium 4f.9f

BBC £».»!

Spcctium to.;o

Spectrum £*.»S

Spectrum CS.9S

BBC £9. SO

Spectrum £$.»$

Sjeclium £S.'S

COM (4 £*.»0
atyouriocal Speitrun

ACCESSORIES From SPECTRUM

C12 DATA CASSETTES £050

CIS DATA CASSETTES £058

VISCOUNTSINGLESIDEO. DOUBLE DENSITY
(10) (FOR APPLE, COMMODORE. ATAU
TANDY) £21 2S

visroiiNT siNCiFcinin, our. n tensity

00) £2135

VISCOUNT DOUBLE SUED. DOUBLE DEN
S1TY (10) (FOR SHARP SUFERBRAIN ETC.)

£3381

VISCOUN SINGLE SIDED DOUB.E 0:NSITY
96 TRACK (10) ;fOP NASCOM, COsA-

MOUORi 8050. E:c) £5' .36

tMPTY DISK CAS!S (fOU »Vi" DISKETTES)

£'.95

DISK HEAD CLEANER KIT £16 10

TELEVISIONS

12" Tap I&W POBTABLE £53.95

OTP3131 14' COLOUR PORTABLE £22195
COMPUTER CASSETTE REC3ROER5

fron £27 50

2ETA loystlekrnr ATARI, fOMSJintinpc, VIC.
20 6 64. SPErTRUM o ORJC . 0NL v f 10 95

Superb value-for-money!

MEMOTECH

MTX SERIES

MEMOl'ECH MTX 512
64K RAM

If User deimabit l-un<tlO(vKeyi • 13 Key Mumcnr Pld
• ZB0A at 4MHi • 24K ROM ecnUin ng VTX BASIC •
«TX NODDY FRONT PANIL OlSPAV • ASSEMBLER/
DISASSEMBLER Vide; Display Processes- wl-h 1tK
vdeuRAM • 64K Uifr RAVi Twin RS232 Communica-
tions Covd ROM Encansions. Node Syilems • M'x
PASCAL • MIX FORTH Eight User 3 elirable Virtual
Screens • Up tc 32 SPRITiS

SPECTRUM PRICE

Also available MTX 500
32K RAM £275

FDX DISK DRIVE

Up to eight Flospy Drives • Colour 80
Column Boarl (optioral) Fait Accevt Sil ton
DISvS * pMffeiful Flups^y 0\a Cuutruller
Board CP.'M 22 Supplied • Teletext
Compatible

SPFCTBIJM PRICE £99*7.00

Menote:h 3;k ram Expansion £50

Menote:h 6*K RAM Expansion ttSi.OO

Me note: h 1:SK ?AM Eitpansion . . . £163.00
Menote:h ftS232CornmL>eiratinn

Port £6J.0D

SEPERATE EX>ANSION ITEMS

Silicon Cisc I256W £38 j.00

80 Colunn Csloui Boird. £10)00

Floppy Cisc Controller Boa'd £233.00

7 Way Bos t» Support Sottvrare

(ocS.O £5).O0

MEMOTtCH >OF"WARE

BJClfiarmton (L-assettr) £3.95

Chess (Caste te) £)95

Blohbo (Caiijtie) £5.95

Kllopede (Casserti) £5.95

Suuci Muefield (CatsMtta) £<3.9S

SHARP

DRAGON
32

Check with your local
SPECTRUM dealer for
our LOW price

DRAGON 64 £22 J. 00

.^ i t ..!..#.-•— ■-«..*..! lit »r~l

al.l.l.l.1.1.1-1.1-1 J i -l-|
'7*7*7 l ^7 t 7M *llHllT '.'iJ

SHARP MZ-7II

(AAZ-700 Series Computer)

FREE! 10 CASSFTTF BASED GAMES
The super new colour computer from
SHARP. Now available In limited cuarrtities
• incuding 10 FREE CASSFTTF RA^FD
GAJvtES from SPECTRUM

£249.95

With FREE Cassette Recorder

SHARP PRINTED .£'29.95

CASSETTE RECORDER £39.95

SHARP MZ80A£399

Net all Item carry every advertised item, please phone before mating i Journey - prices correct at time of going to press l*ol

ATARI 800XL

• ■ 6K RAM expandable to 48K • Ful -
stroke keyboard • Full sound with 3Va
octave range • 11 Graphic Display
modes • Full colour (256 Cotcurs - 12S
colours can he displayed .it one -imp) Ask
to see tils super new micro at vour local
SPECTRUM dealer NOW!

SPECTRUM PRICE

249

95

ATARI 600XL £159.99

1010 CASSETTE RECORDER £49.9$

"050 DISK DR VE £399.95

W7IFTTFR CHANTY HJINrFB rwil

1010 PRINTER PLOTTER £199.99

TOUCH TABLE", TRACK 6AU 119.99

SOFTWARE

DIG DUG t...l\9.99

LUNtKAIJfcK £14.99

And t'Jrly niur-:

CUM AN A
DISK DRIVES

For the more serious user -

the better programming machine

ORIC-1 16K £99.95

ORIC-1 48K.. ..£139.95
HALF PRICE OFFER

Brirg 3 <"opy of "his ad when you
purchase an ORIC-1 16Kor 48Kand
get either the ORIC- 16K or 48K
Software pack at HALF PRICE (Titles
may vary in each pack)

FOR BBC

CS100E £217.35

LilOl tlWf>

CS200E £254.15

CS2O0 £831.75

FOR DRAGON

COS250 £355.95

COS530 £431.80

COStJOO £533.95

C3D!00 £557.60

.

■ ""' !!!:■•""';' " ' ' f

\ Model B

SPECTRUM PRICE

'399

Sensational Offer for BBC Owners!
OPUS
DISK DRIVE

for BBC Model B' Bj
SPECTRUM LOW =>RiCE *P*

189

Including: MANUA1 &
UTILITIES DISC

ACCESSORIES for BBC

Limited Offer!
BBC Dual Disk Drive

SAVE £53.85

ONLY £750,00

BBC BUGGY
£189.00

Now available:

RC DIGITAL TRACER for the 88C

tiS.iO

GRAF PAD Gttphltf Tablet iWS./b

rnuUN-C juyiUikliiLrrtate ... .... 0.93

BIT-PRINT ZK Printer .....£69.95

BB: Sinjle Eisc Drive £265.00

BBI Diik inbrfact Kit (inc. fitting) £S7.00

Acom Software Colette B a.ed Iwm ■ £9.95

Acom DrileBued loftvire £11.50

BBC 01* Band wftware fr«n ...,i9.95

BBC BUjGY Specrum Price £119.00

BBC Di* toai i UtlrtielDilt £J4.S0

QUICK-;ilO- /OV5TICK Clfcci.lly <or the JBC SpeitmiYi priec dtt.flS

Sensational

PRINTER OFFERS

from Spectrum

Incredible
Value! from
Spectrum

NEW!

SEIKOSHA

Model GPIOOA Mkll

■ Pmtlnf speed 53 C.f.S.

■ Full Graphics capability

I Drxihle width Liararler uitpjt uider

software centre!

■ C.itroriic* typ# ^ar.-il.l int.rfac.

■ Paper /rldti is ad J< stable up to 10
irches

SPECTRUM LOW PRICE

199

95

Other Printer
Bargains

SHKOSHA CP1D3 VC £191. »J

•PncntMA r.pmi as ct»».sf

SflKOSHA OP253 X £149.95

£»SO FXI0 £491.9 J

E'SOMWiO ilK.ti

E'SOf* RX jg F/T £ Jot. 8 J

ALPHACOM A2 ter VIC-20 Commodore M. 0'i$or\.

Atari, IBC wrth required interface £99.90

ALPHACOM JC or Z> Spectrum £59.95

MlCROLINt B2A with RS : 3 1 £199.95

MICRO LIN! 82* with Graphics £199.95

MICRO LIN[ M^el 92 £45*.0o

MICRO LINE Model 83A. . £499.95

OUENCATA 60CPS Printer £119.00

rut rnnt «-4for m« ntn. to».»>

ALPHACOM

ALPHACOM 41 For CRACON, BBC "
CO vMCnoRr. ATARI (Interfaces er.ri)

Sprctum slice C79.SS

ALPHACOM 31 For 2X SPECTKUM

Spcctnm Price £59.95

?apef Rolls fo- Alphacom printers

Sox *f S Rolls £«.00

STACK LIGHT RIFLE

For Commodore
64, VIC-20 &
ZX Spectrum

AvtiUMt *** Ih. tHCTPUM ttc

JC ind I be lOrVWODOAF <4

itrrtvnn Now*) :oroei {omplelf

win 1} Iffl o' citilr .nd twee

ea:rtinjf Kiwi farfcvftr. *.im#i Hirlarfri^ "mr.r

NOON iMOOTOUl wl-h lull tni.nd rrti-:li

Spectrum
Price

£29.95

Including 3
FREE Games

spectrum

CHARGE CARD

UP TO £1,000
Instant Credit

• There's up to £1,000 worth of Imtant Credit
aval lab c on a Spi-ciruir Cftargetard, Sec your focal
SPECTRUM dealer for written details (UK main-
land only) Typical n\pR - 30.6%

Turn the page for more super
offers from Spectrum ♦ ♦ .

Spectrum C.ai|i«lirCni.r<ilu<. no .onrtuniii nN.i .mi *. • "ivr. Ike ZK-SpC<tr Jill Compute ., , Ml ul i, -..n t J by ll.Cl.ll Ros.ri.ll UK.

Everything you've ever wanted for your

SPECTRUM

Superb ZX add-on's from your local Spectrum dealer

DK'Tronics KEYBOARD

For ZX SPECTRUM

SPECTRUM PRICE

£ 45

§§SlfflPHS

maumwat'-m:.

«* #> «K W Kc m m » *»

KttHf ifeMW ## *» ,4i

***»• Mm mm **,.■%»%»■■»&$

ZX SPECTRUM

I6K

£99.95

ZX SPECTRUM

48BC

£129.95

Sfcctrjm Computer Centre j have no
connection whatsoe/er with the IX
Scectrim Compute' manufactured
b) Sinclair Research Ltd.

New & exclusive to Spectrum!

INDESCOMP

Superb quality add-on's for the ZX SPECTRUM

VISCOUNT DISK DRIVE

SOUND

AMPLIFIER

£10.95 £39.95

32K RAM
PACK

JOYSTICK

Interface

£14.95

DOMESTIC

CONTROLLER

£49.95

ALPHACOM Thermal printer for ZX SPECTRUM -
NOW DOWN TO £59,95

From RD Labs
for the ZX
Spectrum

£55.50

Now from SPECTRUM a Disk Drive for the ZX
SPECTRUM. The VISCOUNT 5W DISK
D^IVE with interface system and complete
wth all leads.

ONLY

£ 245

CHEETAH

32K RAM

Pack

£39.9$

KEMPSTON

Joystick £| j
Interface

(Joystick opt. cx'.rai

CURRAH Speech Syrthesiser. £2?.95

DICIKONICS Ughtpen £1J.95

DKTRONICS DUALPORT Joystick
Interface £14.95

STACKIICHT Rifle with

3 fREEGAWES £29.95

Sinclair ZX INTERf ACE %

The new ROM Cartndge/Joys'.lck interface
Lojdt piogrjms instantly? takestwo |oy*ticU%!

)m: plui in ind play. ©NLY £I».»J
Plu. New ROM cartridge roftwarc.

PRISM VTX S000

MODEM

MOW. YOUR ZX SPECTRUM IS YOUR KEYTO THE
WORLD with 111* inci.dibl* PRISM VTX SCOO

MODEM
■ Venatle modem for ZXSsect'um >16Kor48K)
versions ■ Slim design fits easly, matches your
micro* nstait acceistofrsitef It KUcranet COO
information services ■ ln;tant coramumcaton
with other ZX Spett'um ne r i ■ Use tie Pr sm VTX
5QCW with a Sinclair printer - and print Preitel
frames

SPECTRUM PRICE £99*95

STONECHIP ACCESSORIES
For the ZX SPECTRUM

ECHO AMPLIFIER

£19.95

PROGRAMMABLE JOYSTICK
INTERFACE £24.95

Coming soon ....

SPECTRUM KEYBOARD WITH

SOUND NO NEED TO TAKE

YOUR SPECTRUM APART

£59.95

Commodore
Model 1701

A superb Colour Vtor-
itcr with sound
SP:CTRUf\* PRlCC

£210

phoenix Ambtr en«.5o

FIDELITY CMI4 Colour C199.9S

SANYO 14" Colcur TV (ideal as a monitor)

t.tl9..9(

SANYO COD JI3INB Colour Mcnito- C2HS.3;
SANYO II" Green Wonitar £W.»

C RAN ADA PEMONAL

coMcuTiKc nrui

Pit ZX SprctiLn ,-nd row to |t<-( tr*

mncl f«*n H f.an

fie Seeitrum Propamner £5.95

I *i<- Speiirurn Bout nl Garret £5.95
Intioduong bpectitim rVachim

CciC . V9i
lie Appe M TOffimntrj
Handbook £1».9S

HrcgiaTtntng with CraDiics . £5.95
The O'jpi 4 how to make t*i*

IYV»it ilf tl t 5 ft

CoTput ng fcr the Hobbyfit t

unitl Bibneu £6.95

Sinjve interring r>roje:t5 •« ((.95
Hi* BBtMitu Ar ejiprt

e jis< . CC.95

CovmoJOfe ? 4 CorfipJtmg 1595

The Onc-1 ard how lo set lie

mat licm ! t j 95

Th? Dragon 32 boat of fames £595
Cctnnuto Languages and their

U*« £595

lyni Coupling CC96

21 0irnO.fpj:MBJC taiir. £595

Chocttinga '■'vroconpuwr £495

OaUbiw. roi lun 4. profit £5 95

IntfudtHi'j; !hr BBC Micio.. . £595
lUHiHiNt

(he WcMfrw Spcttum . . ,£595

run..tionil Fori *or *e JBi. £595

TtirWort-neC-agol 32 . £595

Orjgon V ttampc Mutiv fs«

nicJlVorJ'n^rpmnrodortiif £595
Commodore $4 Machine Cod;

Mj'Jci «»

The Worling C ragon £5 95

TK- Worhrvp; Cpcctrjm. £5 95

Tre Worting CBV, H . £595

Otajjori a Games Master . . £595

and mar.* nor:!

Spcctrurr Cor-iomer Centres hive .a connection whatsoever with the JXipnlnm Computer manufacture* byiindnlr Research Ltd

There's a Spectrum Centre near yoi

Si

Si;

1?1

S9

A*

6C
11

lw
OS

ec

?"!

05
50
15
91
Si
4-gl

00

35

12
£i5

AVON

BATH Software HuS. 12 Yuk SI
Til 105251 61676
B1ISTH Bonsai Corqulw Ltd.
24 Part Row Tel: 10272) 2*41 8t
MSICH-S-MARE KU OomWe-'S.
32 Allllflbl l«l USKHlilKi.'-'.

BEDFORDSHIRE

OJNSTABU Dairrans/ 11 Bros! WsIk
T(l; (0582) 6551J

UIBH10H BUZZARD lit Cmptf* Ctr
at Milicn Keynes Mast; 1 / Unji^.- Si.
Tel 1,0525)37662?

LUTOH Terri-Mou, 49 Gecrge SI
Tel: (0582) 133 9 ','2

BERKSHIRE

BUCKMU Computer Centre. 44 The
Uruadiwy. T:l. (0344 1427317
hLAUHb ujvi'J Saunters. 8 YieO Hal
Plice 1st (0/ 34) 580319

BUCKINGHAMSHIRE

BERKSHIRE V.U Games Jnd Cemisiiters
2*5 H.p 51 SlOLjn Tel T 3.A
BIETHCIEY 'Ian: Conpjiu Cun.it:.
i ir Queens vay ~ei: it>908 64?/44
CIESHAM Reed Phsiojfa'jny i Crnip-
uliis. 113 High St Tel |M94j 7)3373

CAMBRlDQESHiRE

CAMBRIDGE K t Ciw<iulirs I.H 19/20
MirkclSt N: (0223)312*40

iO:er t jays,.

PITER80H0UGH PlrDljti Ci-nrni.Mical nns.

91 Midland Rd (0733)410«7

CHANNEL ISLANDS

GUERNSEY filLls. 3-5 The rolletl.
Si Pete Port Tal: (0481 ) ?<662
J ins El Auiaa & compiler Centre
7 Wei St. 51 Holer Til (0334) 74OO0

CHESHIRE

AURINCHAMI Mi Micro 28 Hieyi SI.

Te [061)941 6213

CHESTER Olkteal Convulers Lid

103 BuuyJilui Tel (02*41 31'JO'J'J

CI.EWEMtniTHiiUri.12.

128 Naitwidi Rd Te D2/:i 21-:*-

EllESNEHE PORT flFR Comrjieis. 1

Peortmn m. WMty Tti on ok aijo

MACCLiSFItlD Camera & CoTipurer Cert-

tie 116 Will 31 Tel: (0625) '74fii

NORTH A/ICF Camera £ Computer Genre

3 *::wr Squar« Te. (06SE) «SC3I

STOCKPORT Wild ng Ld.

1 .lUleUnrJabank Tel: |C6li 480 3435
WARRINGTON WJdincj. Ill ji Op SL
Tr- ilM'S! si? tin

WiONES Conputu City 78 Victim Road
Te (0511 420 3333
WiLMS.0WSw.11 31 '.\ilmsljiv, 4-6 St
Ames Faradi Td.iUCib) 536213

CLEVELAND

M1DDLISRORQUCH Wk, „ A ;rr»-
2C6 Linthrxv; Rd. Te 106411 221368

CORNWALL

ST AUSTELL A B * C Cunpjler s, Outliy
House. 6 Lowe/ A'lrnur Sq
let 10726) 67337

CUMBRIA

UMUftMN FUHVESS Baiww Compitei
f:<nltP JGCIwrchSt tei. 1C2291 3E353
CARLISLE Tre Conputti Ship. 56 53
LMtterStW (022812// u
PENRITH Pevilh ^omnurwcitun-.
HCasicoate TrI r07f>Ai fi/ufi
Oisn Mon-Fi lill tpm
WltTErAVEH P C Ftereren 15 Kng St
Tet (0946) 2363

DERBYSHIRE

AL»RET)N Gc/dwi Hamood 69-71 KiCfl
St Te; 1077;) 8320/8
CHESTERFIELD Tre Canautrr CeiHe.
14 StHpwnsnr. Ptere I* I0M6) '08832
DERBY ' T Fi«cJron cs. at dwelt Tlicrpe,
Th* Spa Tel: (0332) 3t045S

DEVON

EXETER Sewn Cot-ilies I Comrt itei«) I til 7

Pans St eel. fill. (6392 211212

EXMOUTH Ujl-ii Ghannjl. jn Trie Strata

Tel 103951 2J44DJ

PL/MOUTH S>nla< Lit! 76 Cornell

St lei lO/sil 28.'05

TIVERTON Atl-iji Mr.u CctiputetS

37 Barmlon 31 Tel: (0164) 352834

TORpUtY Drr/an Comcutcis. 8 talull Rd

Came ciicus Tei (Odoij jioju.

DORSET

BOURNEMOUTH Lar^owne Ccmp.n;i Ct
1 La:iidcr«ne Cr?scerl Tel (02)2) 2D165

DURHAM

OARL NGTOH WcKerna & Brcwn.
102 Baniigiie. Te (0325I 459744

ESSEX

BASIIDON Godfreys 28-3? Eail Walk,

M. (0208) J39:-.79

EASIIOOM Gcdlieys C-rtn.lHi Genie. '.

Laind'.n Mint Ccnlte lairdon, "cl (0268]

4H747

(HCLMSrortO Hu»Iui t\mnvt« Lid

5 Bionil:slJ Kd Id 0243) ibib'ib

COLCIESTJR ClfctlMlM Cwnirtlttl Cll

16 Si Bctolpns at Tel. ;Ci06)4724i

cn/ws h Fevn<m« 78 0't»tt fa

Tel (CR75| 594f

ILFORD Wtn1rr..-ns. 7F. Ufrrrt Ifne

Tel [01 1 478 1337

l(lllf.lTnW M mi K Miv ii fhainf

J09 ugh ft re: (01 508 1211
FOKfTJRD Cc-l sjute- Cutitiu 72 l>citi Si
Tsl. 0703 752362

HAMPSHIRE

flLOEFSHOr Da-id Sanders 51 Stalnn

14.. Id |U<52I tHl3t

ANOOfER uriMie: Audio. 105 rig.n Si.

T;l (0?64:582£1

BASINGSTOKE ■ she c 2-3 Makcl

nace w ()25tv 22C79
portjmolth Cyrjiius Conputers LB.
2bi Crnnnrcial Rrj . "el: {»70S 833336
PORTSMOLTH (WitirloofillsiG B

MiCtfloiO. i Uuuliij i -jic.1*

T;l 107014 59311

SOUTHAMPTON H. Paikci & Sim Lte..

II West End So, BillKne.

M |07f)Tinr.aj$

WINCHESTER ■AinchestC-r ionv.u &

CanipUer C»itre 75 Parchnent St

W: (0)62) 53982

HEREFORD

HEHEFORO Mlilojav Fi-Tf* . t
43 Uicad S 1 . Tel 10432; 2:573'

HE RTFORDSHIRE

BOREHAMWOOl Ma;te- MiClO.

3 j Shinlcy Rrl lei (01) 9^6368

HI1CHH Caineu Arl> (Miiro r.iTnm?

DvlSlCl!. 6£A inr.Tiia'je hi.,

Tf (01621 5926b

PDTTBS BAR TNe Onpu'er Stop

l}7 H;i S. Te : (07C7}4441?

Sr ALIANS IHcli) •■:■■: l.ii^h.

CtiltlC 14-16 Hrjiywel H II

111 (0*2 7j 52991

srEVENAGE G J Computer*. 1 1 To*r

Sjuaiii lot 10138)61501

HA1F0RO SHS MicrojysleTis Ld. 9- TNj

Pjiade Hgh s:. k-i. ."0923 26S0?

MELWfN GAROEM CITY D. Cuiipulcr., -*.0

r.etneiro Rd. to ;OWJj iB43b. - 28t44

HUMBERSIDE

BtVfcRlEY Ct-iijjliiif iVtri: H SwiU'/'S
■■■airl 0,?< Due lei >0id2 dB1331
GRIMSBY FCJriMGf Ltd 22 -ij aj'l
Rvethead Centre Tei t047») 42031
HULL "he G^mpiiie' Cimre.
26 AnUby Fd. Tel (0482) 7629'

ISLE OF MAN

OlUBtASTH Ctiebsutn . o
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(Just Cpenlrgi

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Tel I0J01I 202020

04AVESENI Maisnal'. Conwtws &

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RAINHAM 'Alcravay Ccrrruters L!0 39
rl ah Sl Midway Towns.
T<r 10*34) J76702
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Tel lUbll 79/5/64

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Tel ()i:636 3}39.-a3C

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All Orn|>.".i!t^ti1 Wi9ni(fr;£;., tf Wgtnso

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Paitidovn Ci;ir,av3n Fe [0/52)3322(5
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utMBtMLtl uauera Mis iHictc Joiucut
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high St Tel: (0 1 1 942 0478
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KICOERMIHSTinCeuir.: Cin.ipulfis, tO

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gate 'iVasroals Centre TM; (0302) 2CC68
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Lauiesl 12 QieenSt. Til: (C4B4) 25334
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TELEX 295931 UNICOM G.

144 YCUn COMPUTEP. A'RIL 1934

jS * ft fl Q— >

Gary Priest presents a
sprite routine for the
Dragon.

As HOST PEOPLE know the Dragon 32 docs
rot have the ability tc mix tex: and high
resolution graphics cr control sprites.

A Basic program thjt uses moving high
resolution graphics is usually very slow, jcrkv,
and wastes a lot of memory by having to keep
checking for collisions itc. The main advan-
tage of sprites are that once they are defined
they can be forgotten abcut and they will
continue to move until diev come to the edge
ff the screen. This means lhat the characters
move faster and smootner around the high
resolution screen.

My spri'e program can handle up to 30
sprites although if you use oil 30 sprites at
ence they will move extremely slowly. In spite
cf this, they wilt stil. move faster than if you
usee (ho Dragon's Get and Put commands.

Each sprite has its own x and y co-ordinates

and places in memory to store information

such as the direction of the sprite.

The machine code, sprite anc attributes and
graphics d£ta occupy about 4.5K at the top of
memory.

(continued on page 147)

Listing 1,

10 REM *»#*#*##♦*###«#*♦**#*«*##
20 REM **EXTENDED SPRITE BASIC**
30 REM **Bv' C-AR V PRIEST CO 19B3*
40 RFM **#*FCR THE DRAGON 32****
50 REM ******««"•«»■»«»*»*■-»»*«»;»»
60 REM 1 i st i nq one

7G REM INITIALISE

GO DPTABE,75,36.A6,BC,BD,B0,CC t Sl t 30 t 26,F7,BE,7D,63,BF

,01 ,26, 10,3E,8t 1 CA,A6,A0 ( A7,EO,lO,3C,82,2C,23,F«>,86,Al

, <\7 , EO, lO, 3E ,92 , 30, Ot , rtO , 07 , GO

90 DPTA10,3C,82,93,23,F6,BE,7D,E7,8F,01 ,28, 10,SF,6E,69

, 10 , PF , B8, 36 ,SE , 74, B6 , BF , 01 , 52 , BE , 74 ,93 , BF, I , 95 , 86 , 7E

,R7,0I ,0\ ,37,01 .«?4,t;9

100 REM WHICH COMMUNE

110 EATA8E,74,B9,5- , 10,9E,A6,A6,A4, Al , B4,26,20,A6,80,Q

l,30,24,06,A1,AO,2i,16,20,F4,84,7F,Al,AO,2i.,OC,-.0,9F,A

6 , 58, 8E , 75, OF , 3A , AE , E4 , t>E ,84 ,30 , IF, A6 , 80 ,81 , BO , 25 ,FA , 5

C,C1,13,25,CC,7E,8B,8D

120 HEM MCWE SPRITES

1 50 LA J A86 , O 1 , B7 , 7E , 6F , C6 , O 1 , B7 , 7E , 6F , 3D , C3 , 7E , 7 1 , 1 F , O

1 ,E6,80.B7,7F,65,B- ,7F,66,Cl,0O,26,Ofi,B6,7E,6F,4C,Bl,7

5,35,25.E0,3^,C: ,01 ,27, :A,C1 ,02, 10, 27, 00, CA,Ci ,03,27,6

0,C1 ,04, 1 Q, 27, O0,8D,B6,?E,6F,4f:,B1 ,7^,3:1,2:1,02,39

140 REM UP

1 SO CATAB6, 7E , 6F ,C6, C2, 3D ,C3 ,7E , 95, IF , 1 , BF , 7F , oB , A6 , 8

0,E6,84 . BD,i>P,D3, CI , 00,27,18, Srt , BE, 7F , A9 , A7 , 80 , E7,Bt ,B

D,70,2D.BD,7C,00 1 B6,7E,t.F,4C,Bl,75 t 3S,2S,91 f 39,BD,70,2

D,3D,7O,O0,B6,7E,6-,C6,01 ,3D,C3,7E, 71 , 1F,01 , 6F

160 CATAB4,B6,7E.6-,4C,B1,75,35.10.25.FF,72.39

170 FEM DOWN

1 BO CATAB6, 76 , 6F , C6, C2.3D ,C3 , 7E , 95, IF , Ol , BF , 7F , 66 , A6 . 8

0,E6,84.BD,6F,D3,C1 , 16,27,C8,5C i BE,7F,68,A7,BO,E7,B4,B

D ,70, 2D, BD, 70, 00,B6,7E,fcF,4C,Bl ,75,35, 10,25, FF,3F, 39

190 REM LE=T

200 CATAB6, 7E , 6F , Ci, , C2, 3D ,C3 , 7E , 95, IF , 01 , BF , 7F ,66 ,A6 . 8

O , E6 ,B4 . BD, 6F , D3 , 81 , CO , 27 , 93 ,4 A , BE, 7F , 68 , A7 , 80 , E7 ,84 , B

0,70,20.60,70, 00, B6,7E,t>F,4C,Bl, 75, 35, 10, 23, FF,0C,39

210 FEM RI3HT

220 CATflD^,7C,i,r,C^ 1 C2,3D,C3,7C,95,ir,Ol , DT , 7r ,uO ,A6 , O

0,E6,84.BD,6F,D3,81 , IE, :0,27,FF , 60,4C,BE,7F,68,A7,80.E

7,34 1 BD,7O,2D,6r>,70,CO,B6,7E,6F,4C,Bl,7S,35,J0,25,FE.D

7,39

230 REM PRINT QLDCrlR

240 CATA34 , 06 , B7 , 7= , 91 , F7 , 7E ,93 , B6, 7E , 6F , C6 , 04 , 3D ,C3 , 7

F , *R , 1 F , O 1 , A£ , SO , B7 , 7E , D5 , 46 ,80 , B7 , 7E , D7 , A*> , BO , B7 , 7E , D

9 , A6 ,80 . B7 , 7E , DB , BO , 70 , D2 , 35 ,06 , 39

250 REM PRINT SPRITE

260 CAT A34 , 06 . B7 . 7E . 9 1 , F7 , 7E ,93 , B6. 7E . 6F . C6 , 04 , 3D . C3 . 7

E,:>D,lF,01,A£,80,B7,7E,D5,A6,80,B7,7E,D7,A£>,eO,B7,7E,D

9 , A6 ,84 , B7 , 7E , DB , BD , 70 , D2 , 35 ,06 , 39, 34 , 06 , B7 , 7E , 91 ,F7 , 7

E,93,BD,70,81,F7,7E,D5,7C,7E

2/0 CAT A91 , BE , 70 , 81 , F7 , 7E , D7 ,7A , 7E, 9 1 , 7C , 7E , 93 , BD , 70 , 8

1 , F7 , 7E , D9 , 7C , 7E , 91 , BD , 70 , 3 1 ,F7 , 7E, DE , 7 A , 7= , 91 , 7A , 7E , 9

3 , C6 ,04 , B6, 7E , 6F , 3D , C3 , 7F , 6B , 1 F , 1 , B6 , 7E , D5 , A7 , 80 ,B6 , 7

E,D7,A7,B0,B6,7E,D9
200 DATAD^,7C,DD,A7
6, 00,30, 86, 30, B9, 01
4,A7,A0,30,BB,2O,5A

A,Oft,3n,rX,7Fi,A<», 1F

290 DATA0B,A6,A0,A1
F,F3,5C,FT t 7F,F3,Cl
E,91,F7,7F,ED,F6,'E
E,D7,BD,7l ,OF,7A,7E
300 DATA7E,93,B6,?E
1 ,0F,B6,7F,ED,F6,7F
5, /D,6'y,lF,02,8E,06
310 DATA0f),B6,7E,"?l
9 , C6 , 06 , A6 , AO , A7 , 04
320 REM **Cat1Mf=iND3*
330 REM CHAR
340 DAT ABD, BE, 83, BC

O,C6,0B,3D,C3,7S,fc9

D,89,Afc,BD,BE,B3,BC

E,61,B6,7E,60,fi7,A0

350 REM MOTION

360 DATABD , BE , B3 , BF

6,7E,70,C6,01,3D,C3

A

370 REM LOCATE

380 DATABD, BE, 83, BF

D,89,AA,BD,8E T 83,BF

l- , oi , t(6 , /fc , V2 , H / , bO

390 REM SPRITE

400 DATABD, BE, 83, BF

D,S9,AA,BD,BE,Q3,Br

D,89,AA,BD,8E,B3,BF

F,0t,B6,7E,D6,A7,8O

E,DC,A7,Ai1, 1A,0?,f,F

410 REM PX

420 DATABD, BE, 83, BF

F,01,E6,B0,7E,BC,36

430 REM Py

440 DATABD, BE, 83, BF

F,01,30,01,E6,BO,7E

450 REM FLASH

460 DATABD, 8E , 83, BF

E,7F,EF,B6,FF,22,BA

C , B6, FF , 22 , SO , OB , B7

F, 26, DC, 16,02,07

470 REM KEY

480 DATABD, BB,E5, 27

490 REM TRIB1

500 0ATAF6,FF,0O,C4

510 REM TRIQ2

520 DATAF6,FF,00,C4

530 REM XDIST

540 DATABD, BE, 83, BF

6,7E,70,C6,O2,3D,C3

0,C6,O2,3D,C3,7E,95

.A7,B0

,□4,35,06,

,00,5A,26,

,26,F6,C6,

,ni ,pa

,80,26,07,

,00, 26, DA,

,93,F7,7F,

,91, 7C

,D9,BD,71,

,EB,B7,7E,

39,B6,7E,*1,F6,7E,93,8E,0
F9,C6,0B, 10,BE,7F,5D,A6,8
00,F7,7F,F3,10,8E,7F,gD,8

5A,26,F7,F6,7F,F3,39,F6,7
F6,7F,F3,39,B6,7E,D5,F6,7
,EB,BD,71,0F,7C,7E,91,B6,7

,0f ,7C,7£,91,96,7E,DB,BD,7
91,F7,7E,93,39,C6,08,3D,C

,F6,7E,93,30,86,30,89,01,00,5A,26,F
,30,B0,20,5A,26,F6,39

,00 , FF , 1 0, 22 , 1 A , 4D , BF , 7E ,5F , B6, 7E, 6
, lF,02 r CA,0S,F7 t 7E,«<?,10,BF,7E,61,B
,00,FF,10,22,1A,29,BF,7E,5F, 10, BE, 7
,7A,7E,69,26,DE,16,03,OC

,7E,6F,BD,89,AA,BD,8E,83,BF.7E,5F,B
,7E,71 r lF,0i,B6,7E,60,A7,80,16,02,E

,7E , 6F , BD, B9 , AA, ED , 8E , 83 ,BF , 7E, 91 , B
,7E,93,B6,7E,70,C6,02,3D,C3,7E,95,1
,W6, /t,V4,A7,80,16,02,3A

, 7E , 6F , BD, 89 , AA , BD , 8E , 33 ,BF . 7E, D5 , B
,7C , D7 , DD, 09 , AA , DD,OC , 03 ,Or , 7C, D9, D
,7E,DB,B6,7£,70,C6,04,3D,C3.7E,DD,1
,B6,7E,D8,A7,80,B6,7E,DA,A7,80,B6,7

,7E,6F,B6,7E,70,C6,02,3D,C3,7E,95,l

,7E , 6F , B6, 7E , 70 , C6 , 02 , 3D ,C3 . 7E, 93 , 1
,BC,36

,7F 1 EF,BD,89,AA,BD,8E,83,BF,7F,F1,B
,OB,B7,FF,22,10,BE,7F,F1,31,3F,26,F

,FF,22, 10,BE,7F,F1 , 31 , 3F ,26. FC,30 , 1

,FB, 1F,S9,7E,8C,3£

,01,7E,8C,36

,02,54,7E,aC,36

,7E.6F,BD,89,AA,ED,8E,93,BF.7E,5F,B
,7E,95, lF,0l,A6,g4,B7,7E,91,B6,7E,6
,1F.01,A6,8* I B7,7E,93,96,7E,91,B1,7

(fisting 1 continued on page 147)

YOUR COMPirER. APRIL 1964 145

TASWORD TWO

THE WORD PROCESSOR

64 CHARACTERS PER LINE ON THE SCREEN AND TO PRINTERS!
MICRODRIVE COMPATIBLE — instructions supplied

"The number of on-screen promp's, together wi'.h the
e*,ccl<cm manual, nmkt it ideal — even 'or an aksotute
begirner. "

PcRSONAL CCMPUTEtl WQflLC Sef-tembct 983

"Whet makes a word processor rrore or less versstih is its
control features. Tasword Tv/o offers an impraxsivA fteioctfon
ord :he tuior program succeeds in dcmons'.rating th?m
admirably. "

Ll£CTIOf\\CSANtiCOMfL/TiNO Nwmniwt i9S3

"lasword is showing a degree cf sophistication ihai business
computers took many yeais lu develop. "

wi-at MfcPOJ Octebm s&3

TASWORD TWO The Word Processor*

Ycur Spectrum becomes a professional word processor
with TASWORD TWO. TASWORD TWO cives you an amazing
64 characters per line on your screen, l his is ideal for standard
A4 paper and TASWORD TWO prints your text just as it
aDpears on yo j r screen .

Tasword Two drives the following interfaces:

Cobra RS232 I/O Port ADS interface

Ftiroelectron'cs Interface Kompstcn Interface

Hitderbay Interface Morex Interface

Sinclar ZX Interlace 1 Tesman Interface

The saute program drlvesthese interfaces. Ashort easy to fol-
low set of irstrjctions takes you through setting up your Tas-
word Two to drive the interface you have or choose to buy.
Tasword Two also drives the ZX p r inter.

Tasword Twc is readily adapted (or Ihe microdrives :o give
stpfcii-fasi saving and loading cf Doth program and text, "he
microdrive instruction are supplied with the Tasword Two
manual.

£1 3*90 fullv inclusive mail order price.

TASWORD TWO TUTOR

IASWUHU IWU comes complete with a manual and e
Ccssette The cassette contains your TASWORD TWO and
TASWORD TWO "UTOR. This teaches you word processing
using TASWORD TWO. Whether you have serious applications
or simply v/ant to learn about word processing, TASWORD
TWO and TASWORD TWO TUTOR make i: easy snd enjoyable

TASWORD TWO £2 Demonstration Cassette

Se« for yourself the powerful features of TASWORD TWO.
Send just £2 for the Tasword Two iemorstraticn cassette. A
vcucher is included which gives you £1 off the p-ice of
TAG WORD TWO.

All prioes include VAT and post and packaging
* Available from larger branches of Boots

Fcr further information on all these products S2nd an s.a.e.
with Tasman Brochure" written on the flap.

E3

Senc chequo.'P.O. or Access number with order.
Telephone Access crdes: Leeds Wi>'£/\ 43d3Ul

TASPRINT

A. must for dot matrix prirter owners! 3 rirt your program
output and listings in a choice cf five inpressive print styles.
Drives al the printer interfaces listed under Taswoi d Twu and
all dot matrix printers with bit image graphics capabilities.
You can also use "ASPR NT to print Tasword Two text files.
TASPRIIVT gives your outputongtnalitv and style! Senc s.e.e.
for bnchure which includes TASPFINT outpit.

£9.90 fully inclusive mail order price

TASWIDE - 64 characters per line!

A machine code utility program, TASWIDE doubles he
information that your own programs cen display. Make a
simple charge to your print statsments and your output
appears on the screen at 64 characters per line instead of the
normal 32. Both print sizes can be mixed on the screei. 16K
and 48K versions supplied on the same cassette.

£5 50 fully inclusive mail order price

TASMATH 1

P/athematics education Three programs on ore cassotte:
TASIMEG - simultcneousequations
TASQ J AD - quadratic equations
TAS-TRIG- trigonometry of right angled triangles.
Available for the 16K and 48K Spectrum and 'or the BBC
model B.

£5.95 fully inclusive mail order price
TASMAN PARALLEL PRINTER INTERFACE

Plug into your Spectrum and ri'ivr. any printer fitted with the
Centronics standard parallel irterface. Supplied complete
with ribbon cable and driving so'tware. The cassette includes
LUST, L°RIVT, md text screen copy softworc for all
Centronics printers. The user changeable interface software
makes it easy tc send ;ontro codes to your printer using the
method so successfully pioneered with Tasworri "wo. Tie
cassette also contains fast machine code high resoution
screen ccpy software for Epson, Star, Seicosha, Shhwa, aid
Tandy Colour Graphic (in colour!) printers. Send s.a.e. for
brochure which induces sample print-outs end a full ist of
printes supporter hy screen snftwarft Compatible with
microdrives.'ZX Interface 1.

£45 fully inclusive mail order price

TASMAN RS232 PRINTER INTERFACE

Specification and software as above hut drives pr nters
fitted with the RS232 stardard interface. A low cosl route to
printiro - especially suitable fo- uso with th=» Tandy Dolour
Graphic printer and the B'other portable typewrite r'prhtes.
Suoplied compete with cable - please specif 1 / whether 4 pin
DIN or 26 way D plug roqiircd.

£38 fully inclusive mail order price

TASMAN SOFTWARE

Dopl. YC

17 HARTLEY CRESCENT LEEDS LS6 2LL

'46 YOUR COMPUTER, APRIL 1984

(fisting i continued from page

E, 93, 22, 05,25, 0D, 16,01 ,DO,

E,93,B0,7E,91 , 1F,B9,7E,8C,

550 REM YPISr

560 "JATABD,BE,B3,BF,7F,AF.

& , 7F , 70, C& , 02 , 3D , C3 , 7E ,95 .

<b,7E,60,C6,02,3D,C3,7E,9S,

6,7E,91,B1,7E,93,22,B2,2S.

570 REM COIN;

580 JATABD,Bi,Q3,BF,7E,6F,

3,7E,95,1F,01,A6,BO,E6,B4.

fc.,/t>,U<b t Oj: t iJ,L5 t /t,V5,lF,

0,Bl,7E,93,2*,0(r,B6,7E,6F.

C,36,B6,7E,70 T B1,1F,10,27,

5*70 DATAOD , 4C , 2<i , CD

fcrtO REM BLSPR

610 DATABD,BE,B3,PF,7E,6F,

.^,7F,95, lF.Ol ,Af>,90,E&,84.

620 REM LASER

630 DATA3«,32,B6,FF,23,8A.

7,FF,20,8ri,19,7F.rF.20.BD,

F ,23, B4, F7 , B7 , FF , 23 , 55 , 32 .

9

640 REM NUM

650 DATABP, BE, 83,80,00, IE.

5,35,16,O0,A4,7E,0B,BD

660 REM CURSE T

67<*> 0ATA&&,ee,S3,BF,7E,3F,

D,B7,75,67,DD,8E,83,BF,7E,

5,6B,20,7f;

660 REM PRINT ROUT INC

6S0 DAfAlF,2l ,FC,75,67,31.

145)

DO, 7E, 93, If

36

,£■?, ,'E,3C,36,B6,7

Rn.fm^fl.R^.RF.B^.RF.TF.SF.B
lF T 01,30,01,P6,B4,B7 t 7E,9i,B
IF, 01, 30, 01 ,fl6,B4,B7,7E,93,B
eB,16,01,5D

B6, 7E , 70 , B7 , 7E , 6F , 26, 02 , 3D,C
B7,7E,?l,F7,?E, < ?3,36,0i.B7,7
Ol,A6,B0,Bl,7E,4t ,26,15,A6,8
B1,7E,7O,27,C6,F6,7E,7O.7E,0
01

B6, 7E , 70 , B7 , 7E , 6F , 26 ,02 , 3D , C
BD,6F,D3, li,CO,CC

08, B7 , FF , 23 , EE , 00 , 'J 1 ,06 , FD, B
14.30,OJ . 8C, CO. 9B, 25\FD.BA,F
16,00,BF,1F,12,31,3F,26,FC,3

22, OC , BF , 7E , 5F , B6 , 7E , 60. B7, 7

BD,a*7,AH,B£j,7e,60,dl ,^O.^Z,fc
5F,B6,7E,60,ei , 18 , 22 ,DD,B7,7

06, A6, 80,81 , CD, 26, OE, 35, 06, 8

6 f 75,67,Bl,18,22,O4,4C,B7,7S,68,39,C6,0B,3D

F , or , 35 , C6 , BU , /4 ,4 1 , 4U', Ol , 20 , ^S , DQ , 4F , 5C ,C 1

A, BI> , 74 , 5E , 20 , CC ,34 , 36, BE, 06 , 00 , 30 , 86 , 30 ,89

6,F9,C6,0B,A6,A0,A7,84,30,88

7O0 DATA20 , 5rt , 26 ,F£, , 35, 36, 3? , 34 ,36 , C6 , 00 ,34

F, 35 , 04 , 5A , 26 , F6 ,35 . 36, 39, CC , OC , OO , : , 8E , 06

O, AE , C I , AF , ft 1 , Sfi ,26 , F9, 4A, 26 , F6 , 39

71 REM ROiniNFR

720 DAT ASF , 7E , 8C ,36 , F7, 7E, 6ft , 9E , 6B , BC ,FF ,FF

4,10,BE,FF,FF,3F,7E,5D,35,90,20,E5,BF,7E,6B

C,FF,FF,27,EB,32,62,BD,BA,C3.0F,6F,BE,7E,6D

5,A8

730 REM TABLE

740 DArA43,'8,U ,D2, 4D,4F,54,49 ,4F ,CE,53,50

t>,<U,,4l- ,45,*1 ,b4,L!b,50,D8,50,D9,46,4C,4l ,53

9,47,B1,54,52,19,47,B2,4B,45,D9,5B,41,49,53

9, 53 , D* , 43 , *F , 49 , 4E ,C3, 42, 4C , 53 , 50 , D2 , 4C ,4 1

6, 32 , 43 , C3 , ^D , *F ,Cj6 , C5, 4£ , 33

750 DAr0CD,-63,55,52,53,45,Di

760 REM DISPATCH

77F> DAFA71 ,36,71 ,76 , 7 I, CA, 71 ,9rt T 72 , :6,72,2C

7 , 72 , BF , 72 , 7D , 72 , 96 , 72, E7 , 73 , 27 , 73 , 7A , 73 , 98

4,73,CC,73,E3

7BO REM DATA

790 DAI-ACO, A5, 50, 54, 45, 4E, 4* , 45, 44, 20,53 ,30

5, 20 , 42 , 41 , 53 , 49 , 4^ , ?0 , 3 1 , 2E , 30 , OD , 28 , 43 ,29

3, 20 , 47 , 4 1 , 52 , 59 ,20 , 50, 52, 4? , 45 , 53 , 54 ,2E ,2E

BOO P0KEWI7E69,!

810 FOB A=t»H7E7A TO &H7FF5:F0KE A, 32: NEXT

B2o FOR A=281EK> TD !:H756e

030 READ A*: POKE A , V AL (" &H " + A* I

840 NEXT

i,C3,7S,69,l
,18,2E,D2,5
,01,OC,5A,2

,04,BC,74,6
,OO.CE,06,2

,26,0C,39,3
,BE,7E,5D,B
,9F,A£.7E,8

,52, 45,54,0

,C8,54,52,4
,04,5";, 44, 4
,53,45,02,4

,72,44, 72, D

,BC,31,6E,A

,52,49,54,4
,31,39,38,3
,2E,0,OA,OA

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(rrtnlinnerf from page 1*5)

Before you type in ihc lining of the mair.
machine c<«lc — 1 sting [, type
CLEAR 20C,2817g
Thee type in listing '..

Wiicn you have checked tlut all the daU
is correct you can save (he machtr.e-code
routine with the command:

CSAVEM = 'SPRITES",281 80,32766,281 80

You can now execute ihc machine code by
i\ping:

EXEC 2E 180
You should see the message

EXTENDED SPRITE BASIC 1.0
1983 GARY PRIEST...

Yoj ore now in extended npiitc Baiic. To
get some idea of what is posible with your new
extendec Busic enicr the sprite derr.onstra:ior.
program in isting 5. This program sets up the
sprite at.ributes for the f.rst eight sprites and
dcfinis four characters as one s.ngic nian

Four spri.es start at the top of! the screen
and four ai thebo:ton. These two groups gc
up ar.d down the screen. When they reach tlw
top or the bottom they bour.ee ofTthe ed^es.

Ii" /ou piess Enter you will hear an odd
srund — this is tie sound produced by the
(Laser command. The eight sprites will be
blanked rjut and sprite two will be defined as a
rcugh footbill. Sprite one is defined as a man.
The man runs up ro th; football and kieki
it.

When sprite* move ihey do not destroy
whatever they pass over as long as it :$ a
defined character. To dcmonstiate this there
is a thirc pari of the dcii.tnj.-n a ion

Listing 3.

10

REM LISTING THREE

11

REM

20

PM0DE3: PCLS: SCREEN 1 ,0

30

mi ITR7

40

A*=IrMKEY*:IF A^""

THEN 40

50

IF A*>"0" AND A*<"

5" THEN COLOR VAL(A*)

60

IF A$=CHR$<8> AND

X>0 THEN X-X-l

70

IF A*=CHR*(9) AND

X<7 THEN X=X+1

80

IF A*-CHR$<94> flND

Y>0 THEN Y=Y-1

90

IF A*=CHR*<10) AND

Y<7 THEN Y=Y+1

100 IF A$=CHR*U3) THEN 130

110 PSET<X,Y>

120 G0T040

130 CLSsFDR A=1536 TO

1760STEP32SPRINTPEEK ( Al : NEX i

program.

To write your own programs that use
sprites you nusi first understand vhal each
tie* eoniiiiaiid fIfjcs and the syntax for using

it. You must also know how to define
characters and sprites.

To cefine a character for use in PMode, 4,1
you must draw tv\ & by 8 grid and draw ycur
eluuuttcta in the grid.

To be able to use the !Char command ynu
must have eight pieces- of data. Tliese einhr
bytes make up the character. Take the tap
rov. Look at the Fight squares in the row.
Add up the numbers above tne filled in
square?, eg., 4 + 8^16+32 = 50 so the first
pie:e of data is 60. The whole men would
be:

X = .'CHAR chr 00,63,60,60,24,255,
24,36,66

To design mulricolour rharartm type in
l.sting 3. Keys 1-4 change (he colour and the
arrtiA' keys arc used to draw your characters.
When you are satisfied with your character
press Enter. The program will print the eight
pieces nf data fiir ycni to use in a IChar
statement.

To define a sprite you must use four
characters :hat you have previously defined.

There are 1 1 new commands for the
handling n" ftpriirt"

[SPRITE - This command is for defining
sprites. You can defire sprites 1-29
inclusive.

To use the command you must give the
snrite r.nrrhftl and fnn- r'naracter r.umbers
tnat make up the sprite eg.

X=!3PRITE 1,65,66.67,68

(continued on page 149)

VOIR COMPUTER, APRIL 1984 147

t_l_l_l_l_l_l_l_l_l_l_<_l_l_l_l_ I l_l_l ] _l_l_l_l_l_l_l_«_l_l_l_<_l_l_l_l_l_t_l_1_l_l_l_l_l_ > l > _l_l_l_t_l_l_l_l_

Geography teacher Bob Phillips' program on the s:hool's BBC
Micro needed a map of Australia divided into states, with the
rames of states and cities appearing when reques:ed by the
student Using an RD Digital TRACER, Bob prepared this usually
laborious task in just six minu:es "It's so sirrple," he said *. . . it's
t'aoed directly from en atlas, scaled up or down as neeced. and
so I ha^e a very accu'ate p-esentation, witi plenty of colour and

mo/cnent tD mainta n
the kids' interest"

The RD Digital "RACER is specialty suitec for educatioral
from geography to biology, f orv chemistry to arb

us:

and crafts. It's features include:-

• Immediate reproduclion from orignal drawings
(up to A3; to display file

• Adding geometrical shapes, text, colour aid shading

• Autocratic re-trace, or aiiivation (on BBQ

• Save your drawirgs on cassette or printout, or merge
witi your own programs

• Uses all the BBC's colOLr graphics medes, including
ietetext

• No previous computer knowlecge ieedec.

Av3«!tiol€ dnect from S.uecl'um stores sr Guff n6 George

ri~iV<*rr~i~i"i"i~ri"i"ri*i")*r«""ri"i~i~rt"rrri~ri"rrrrri"i~t"rri~rr

Tracer(s) for 3BC Micro at £69.95 each, total £_
Trace-Is) for ZX Spectrum at £55.50 each, total £_

Cheque, payable to RD Laboratories Ltd, for £ enclosed.

Send lo: Ocpt YC4 RO Labo atones. Lie! 20 Ccurt Rcac Estate Cwmbran
Sweil NF'44 ,1aS A tow za d^ys ior tbtvay,

_l_IJ_l_l_IJ__l_l_l_IJ_l_l_IJ_IJ_l_M_l i _l_IJ_l_l_l_l i

For (uilliei Oelaii> wnls 'SM nlraKi) ci nhene

RD Laboratories

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ■ 1 1 1 1

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"r»"i~i"i rri~ri - i~i~i"i - i~i'"i~'"i~M "i*"i~i"i"<"i"i"

. K -M

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r /ttOBVV

wHL

Too many programs to choose from?
Too little background info and data?

2>0F TWCWJ* Is your answer,

The mast nnmprehensive magazine listing of Soft-
ware programs for the eight leading Microcomputers.

• BBC • COMMODORE 64 • DRAGON • VIC 20

• 0RIC# ATARI 400/8000 SPECTRUM • ZX81
k IN YOUR NEWSAGENT'S NOW _

OVER

2.500

PROGRAMS
LISTED

^rGuideto/Wc^ com

Software Index gives a description o' each program listsd
and provides information on prir.fi, prog-am operaticn,
sound, memory requ red, cotOJT, names and addresses
of retaile's and in many cases a screen photograoh.
The whole range of programs are covered in the Index.
Gsmes. Education. Utility. Business. Perscna Management.

Don't let software give you a hard time, get
the user guide to microcomputer software.

Puter Software

W*

1984 No.2 tu

148 /OUR C0MPU1ER, APKL 1901

(continued from page 147)

would define iprite . assuming that you have
defined the letters of the alphabet. The
character number may be 0-254.

JNUM This command is used to control
ihe nu:nbcr of sprites appearing on screen.
You may have up to 29 sprites on screen it
once.

To use the command you must add one to
the number of sprites thai you are going to use
e.g., if you want two sprites then you must
use

X = !NUM3

ILOCATE — This comrmnd positions a
sprite en the high resolution screen. You must
use the sprite number, X co-ordinate (0-30),
and the Y cd-ordinaie <i)-22).

EMOTION — This command set< the
direction in which a sprite is to move.
U = S!OP, 1 = UF, BRIGHT,
3 = DOWN, 4 = LEFT.

To iet the motion of" sprite 1 use X=
MOTION 1. direction.

1MOVE — This calls :he machine code
sprite move routine. It moves the sprius
selected by !Num and that Jo not have a
motion of 0.

Whet a sprite is about to move oft" the
screen it slops automatically.

IPX — This returns the X co-ordinates of a
chosen sprite eg., if sprite 1 is at 10,10 th«n

using:

X = !PX1
will return the value 10 in the variable X.

IPY This works in the same way as !TX
but returns the Y co-ordinate insveac.

IXDIST — This command returns the
distance between the X co-ordir.ate> of two
sprites eg.,

X= IXDIST 1,2
returns the difference between the X co-

ordinates of sprites 1 and 2.

1YDIST — This command works in the
same way as IXDist but returns the dif erence
between the Y co-ordinates of two sprites.

!COINC — This euimuautl is used Lu detect
collisions between two sprites.

If sprite is at 10,10 and so is sprite 3 then if
you use

X-ICOINC1
then X will equal 3 or if you use

X=!COINC3
then X will will equal 1. If sprite 3 was at 9,9
then

XVlCOMCI
would equal O.

JBLSPR — This is useful for blanking out
a certain sprite eg., if sprite . h?.s come to the
edge of the screen and has s.opped then use

X = !BLSPR ■
This wLl not blank rnti whatever is under-
neath sprite 1.

Th^re are eight new commands thai are not
for controlling sprites.

!CHAR — This command is used to define
characters. Yol may define characters 0-254.
You must give :he character number and then
the e.ght pieces of data separated by commas
eg-,

X = ! CH AR 32,0,0,0,0,0 0,0,0
will define character 32 as a space.

Listing 2 givss data for defining cluracters
32 to 12S.

IFLASH a,b — This flashes the screer. 'a'
limes with a delay of *b' between tlasics.
ie.,

X = IFLASH 10,20000

1TRIG1 — This returns if the fire butron
on the right joystick is pressed or I if not.

1TRIG2 - this works the samt as IT'igl
but for the left joystick.

!KEY Th.s wails for you to prussa key. The

ASCII va ue is returned ie., iT you pressed A
then 65 would be returned. If you press Break
then 3 will b; returned and the program will
not Break.

ILASER — This produces a simple laser
sound eg.,

X= ILASER
!FREE — This replaces the Diagon's Mem
function. Try

PRNTMEM
Yoj should get he result 0. Now try

PRIMT'FREE
this gives you the amount of memory left.

1CURSET x.y — sets the position for
printing on the high resolution screen, xis the
x ootdinate which may be between 0-32 and
y is the y co-ordinate between (1-2$.

To print on the high resolution screen,
mast a siring of the characters vol wish to
print and adc a carriage return ic,

A$ = "DRAGONSRU_6 0K" + CHRS(13)

Make sire that rear the beginning of the
program you have z line srating:
DEFUSE 0=SH7408

When you are reedy to prir.t, type

X = USR0(VARPTR{AS'))
'.m<\ the ronteots nf AS shnuld b* printed :>n

the high resolution screen

flease note tliat whatever variables I have
used can be changed to whatever you like.

When e command needs numbers after it
you ran use variables ie., instead nf

X=!NUW3
you cculd give variable A the value of 3 and
have

X=!NUMA

If anyone doe*, not feel up o typing n the
programs they cai obtain a casset.e tape of die
programs from me at 167 Ludlow Road,
itc.icn, Southampton S02 /EL. Thi cassette
costs £3>.

Listing 4:

20 REM *»*SPRITE DEMO*-**

30 PMODE4:PCLS:SCRFENl,l

40 U»!NUM V:Ktn Lfcifc B SPRITES

SO REM DEFIKE THE 4 CURS

60 Q=!CHAR128,7,13,]3,15,12,7,l,127:REel TOP LEFT OF MA

N

70 G=!CHAR129,224,176,176,2«0,48,224,12Q,254:R£M TDP R

IGHT OF MAN

BO 0" 'CHAR 11^,1 77, 1 , 1 ,?,4,R. 1 A„*7tRFM RDTTOH I EFT OF M

AN

90 Q=!CHAR131,254,i28,12E,64,32,16,8,4:REM BOTTOC RI6H

T OF MAN

100 REM DEFINE Tt-E SPRITES

110 FOR A=l TO B

120 Q=!5PRI~E A, 128, 129, 130.I31:NEX _

130 REM LOCATE SFRITES

140 FOR P=l TO B:R£AD X,Vi Q= 'L3CPTE A,X,V:NEXT

150 DATA1, 0,8,0, 15, 0,23,C, 4.20,11,20, 18,20, 26, 20

160 Ren eive the bprites a i>irectidn

170 FOR fl=l TO 4:D1 ':A)=3:D2.A) = 1:NEXT

ISO FOR P=5 TO 8:D1 :A)=1:D2:A)-3:NEXT

190 FOR r-i TO 0.Q- MOTION A , Dl te J e NEXT

ZOO REt fOVE T-IOSE SPRITES

210 Q='MCVF

220 P=!P'v5tREM P=Y COORDINATE OF SPRITE 5

230 IF P=0 THE^ COSUB270:REM IF SPRITE 5 IS AT TOP OF

SCREEN THEN RHQNGE DIRECTION OF ALL SPRITES SO THAT TH

EY BOUNCE

240 IF P=22 THEN 190: REM IF AT BOTTOM THEN CHANGE DIHL

CTIDN SO THAT THEY BOUNCF

150 A*=INKEY*:IF A*-CHR*il3i THEN 290

2bO 60TD210sRE?t HOVE THOSE SPRITES AOAIN

270 FOR fi»l TO 8:Q=! MOTION A,D2<fi>:NEXT

180 RETURN

2-70 G-ILftGCRsir TLAC-1 THEN 7CO

300 REM FLASH THE SCREEN

310 Q^» FLASH 10,20000

7.70 SCRFFNJ , 1

330 REM BLANK OUT THE SPRITES

340 REM PCLS WILL DO THE SAME

350 FDR A=l TO a:Q-!BLSPR A: NEXT

36C Q=tNUM3:REM USE 2 SPRITES

370 Q=! LOCATE I, 2, 10

38<; Q= • MOT ION L ,2s REM IT'S GOING RIGHT

3VC HtM Uht-INt A HUUIiH hUUIBHLL

40C Q= ! CHAP 1 32 , 255 , 255 , 255 , 255 , 255 . 255 , 255 , 255

410 Q=!DHAR32, 0,0,0, 0,0,0,0,0

42C G-!CTniTEI!, 32, 32, 132,32

430 B-!L0CATE2,20,11

440 Q=!MOTION2,1

4S0 RFM MfU'F THAT FfinTFlAI 1 FR

460 Q=(MOVE

470 Q=!MOTJON2,0

480 FOR A=1 TO DL:NEXT

490 TEST=!XDIST1,2:IF TEST=2 THEN 510; REM HAS HE REACH

ED THE FOOTBALL

500 G0TG460

S10 U»:rUUUNl,(.l:Htn. alir hUUIBPLLtK

520 0=' MOTIONS, 7: REM 3ET BALL IN M0TI3N

530 Q='l»OVE:R=M MOVE THE BALL

D40 TEST~!PXZiIF TEST-30 THEN GCTQ 370

550 FOR A=l TJ DL: NEXT

560 G0TC530

S70 CLSiPRINT"**w**nCTICN RKP.AV«**-t*»"

580 FOR A=l TD 1000:NEXT

590 IF rx=70 THEN A30

600 DL=70

610 SCREEN! ,1:PCLS

620 GOTC330

630 D"F USR0-!(H7408-.REM ADOR DF PRINT ROUTINE

640 0=!CURSETO,12:REM PRINT AT 0,12

650 C_S:PR:NT"THE SPRITES DO NOT DESTROY ANY DEFINED

CHARACTERS TH*VT THEY PASS 3VER ?': PRINT" PLEASE PRESS

A KEY ftND WAIUh "
660 Q«!KEY
670 S3REEN:,1:PCLS
60<» 2*-CTn.NG*(22,132>+CHR*(13) iO-UBRO <Vf\RPTR(2*) } iREM

PRINT 2*
690 RESTORE
7O0 F-A6=l
710 GDT04O

720 CLS:PRINt" THAT WAS tHE END OF THE DEMO PROGRAM!

" : END

VOUR COMPUTED, >\PRIL 1934 119

I

.. . .....% --II

'Sf^fi-.-'f

^ty>+*v>(x->»..(*v:t^«««M» <*»<.•*•

iiiii»*£l

•:>-L, ,,-■...,■:. •-.

TOOLKIT

: :

- ■
f :

:

TOOLKIT i'rogkams have hcen published

before, inos:ly concerned only with

graphics and/or sound. Thi; is all very

well bin first you rued to liavt written

a Basic prognm -.0 use ihem and

because of the nature o~ Basic the

result i:i very often i mess, lailcndx of

unwanted programs anJ line numbers
going up in random steps.

Thii program is designed to aid the

program vrirer by providing a number

of useful, user friendly routines to liike

a lot of the *'ork out cf program writing

and developing. Th; first ard most

important of these is the renumber

/// routine. Renumber routine> have been

•V^ pubf shod before rut these were all veiy

limited as all they could do was re-

nuiv.bei the iint njmben, not the Goto,

Gosub etc. This renumber routine :s

ditt'erem, il will rencmcer the program using

j. specified start and itctj value and afi.tr

renumbering ih* line numbers it will

renumber all the Goio's, Gosubs, Run, Lists,

LLists,attd restores. The oily disadvantages,

;ind these rre very small, arc:

■ T.ie routine will not icliuiliIhii linei a>;

SAVE "filename" LINE rumber

John Charlesworth takes
the hassle out of
program writing.

■The routine will not renumber lines of the
fcrm Goto calculation. For example:
GDTO 1000 + ,100 ANL" x = 3t + i200 AND
x = 7}

■ The routine wil not renumber Goios etc,
which refer to nor.-existant linen.

In the event of the first or nird occuring the
computer w:ll ignore « but in the event of the
second the computer will print the message

Cf.n't rerumbei line mnn
nrmn being :he oflencfing lin: and the routine
w II return hav.ng done nothing.

The second routine provided by this toolkit
is a Rem kill loutine. During program
drvrlnpnu-ni R.'rn statement; aie very useful
but when tie program is finished they no
longer serve any purpose and simply slow
dewn loading and saving mi what this program
dees .s search through the program for Rem
SUtcmcn s and ivhcn it finds one ir HHrt« it

The third routine is a block delete. This

prognm wil. remove all the lines between iwu

specified tines anc is useful for cvarr.ple to

(continued on pai}e 1 53)

Listinc 1.

I'O 1>EF FN k <a*)=i6*CC0DE a*~48
-<39 AND a*(l> >"9") H-ttODE a*<2>
-48- (39 AND a*<7) >"9" 1 1

20 CLEAR 31270: PRINT "Pokina
in progress": LET k=31276

SO FDR a=0 TO 20: READ a*i LET
t=0; LET tl=VAL s* ( TO 4< : LE~
a*=a*<5 TO )

40 FOR b=0 TO 63: _ET v=FN x :a
*(b»2+l TO b*2+2>): POKE s,v: LE
T t=t+v: LET x=x+Js NE>T b

50 IF tOt J THEN PRINT "Error
in line ": 100+a*10; 3T0P

60 NEXT as PRINT "Firished": S

TOP
lOO DATA ' 73O3ca367ac:0'?6Tccdac7

Cc92a535ced5b4b5c£7ed5219c82be5d

del 23232323237ef eOe2J06232323232

3237e r cOJ2Q I ti * e?e 1 2824 * eeij2820f kk

c231cfeed281Bfe"

110 DATA "7046f02814fef72B10231
Sd5sd5b4bSc 1 1> 1 b»7ed52 1930c leViK7
e-fe0d28edfe3a28befe0e20072323232
323166^6303806*6333:1021861 dde5c
riAhOrirrtrrlt-f ?tc-:V'

120 DATA ,, 64437a7ef3Ue2804d7231
8-f 7dde 1 Jd460 1 dd4e02cd 1 1 1 ac 1 c9 1 60
000436 16627747077AfiA.:>7SArir l ?Af : ;7?"7
06c696e65200d3ef f 18023e2* a73eed5
230*bl9c9e53e0a"

130 DATA "7388a711e803edS219301
33da71l6400ed521930093ca7le0aed5
230013deic9e5e5ebl31afe0e20fa7bc
6053001 I45f E?ld5eba7ed527ddlelc9 e
511eS03a7ed5219"

110 DATA "44933013116400a7ed521
93t>0f Ie0aa7ec5219300-f lS14cddf7a0
203 1 16400cdd4 7aC»2C3 leOecdd f 7a020
37dc63O02O33eOe02C397O2O302O3e3 7

dO2O37c02039702"
ISO data ■e<s?e>..9+d2a333t.td2t>f de

5cl-Fd5eC>3fd560413l31313-fd.9-fde5d
1 a7ed52 1 930o8c 5f d e 1 c 9 1 6005 -f f eO a 3
a0ll5edd-f7d*e&fc:>1-fd&cO;?l9fd74O*f
d7503fde5eld5dd"

IbO DATA "815855dla7edb2-.93C»Oid
» Hri 19c9d lc9o5cdL»a7b4.72a'.->OSbc:de'P7

ac J t?5LiQ2a 1 l»902 -jf 5-1/21*6 1 3ca /ed^24
44d626bed44G53001 246f edbG-f 1 ccJ8f 7
h2a005bcl03ed24"

170 DATA "73557bi.9eDcdO t i/lj472eiO
U5bcde97ae 1 e5b828e79023f £eb2<atol 5
ca7ed5244idl9545d833001145t : edbei
QcbcS237c4o0d2610fe3«200cre*0e2a0
a+e3038D4fe393E"

180 DATA "6781eaelc92323235e235
6dd6&0Jddio02a7od521920eceleScd6
d7b3aO25b-feO52005cdba7blBi:i3rdct;7
bel23c92aS35:252323237efe«Jd2825+
•O»20042323 1 Rp-f "

190 DATA ,1 7S34f«*i2B14f««S28L£M
t*ec280cfeed230£fsf 02804+6* 720dac
d 167c 1 Bd5lidSD4b5c 1 h th »7pHR7 1 9^c
«>c9+ 3f d=5dd23535cdd2b3e003202532
1 000022 JG5bc 356"

200 DATA "738C/c2aOO5bdd7401da7
502dd5e03cd5604dd 1911 0400dd 192=»0
05b2322Ci05bdiBee 1 ed5b4b5cl ba7ed5
21938d2fdel-fbc9f3-deS2a4b5c2b23C
d6d7bfd55cdoldd"

21 O DATA "68864e02dd46012a0353B
d5b055b?7I9Oab92O-bb820*a44^ded4
30L>bb3e0132025bcd5B7c2d005bdd740
Idd7502ed4b055ba7ed4222005bdde3e
123cd6d7bfde5dd"

220 uaih "/4}^Jel2a06bbed5b0553a
7ed52ed5bC05ba7ed52 I920cbf de 1 f be
92a4b5ced5b535cl31313a?pd52l9ddd
U2j3G3cdd2bdoe3eiZ^23232323/6+e(>
e20O32318-f3feea"

230 DATA "7Ci5B20.4feOd2O(?*c.5dJ«

lcdSb4bSulblb«7=dS21730dcc9(.dejU

1 1 3 1 3 1 3 1 3 1 3a 7ed52 : 92B350 1 3O002b5
45d031 3 I af e0d20f 9ebe5d52 I 0O0Oa7w
d42ctdde&C4dd6c"

240 DATA "8Ci6703:9dd7S03dd7404c
ddf 7cdla7ed52444deledb0dd95El 189
8ddQSolddS&04dd5e0317110'i;>01<?ddo
5dl e5d5eba7ed52eb 1 QdS2a4b5c 19224
b5r2£595cl922S9"

250 DATA " 6<?015c2»M Sri 9??M =;<-«-
9dd2a535cdd65eled5b4j5clblba7ed5
2d?dc2b2a035bdd5602d J560 1 9ba7ed5
2 1 9eb301 ccd5e03dd5604dd 1 91 1 04("i "id

rt 1 vedtib4btjc lb 1 b "

260 DATA "7322dd?5L>ldi7edb238d4c
9dd22035b2a055bdd5e02dd56Oleba7e.
d32 1 9et>30 .J iJU . j u'-.i- J ti-t,i.i -in n 1 Y l KHy
0ddl9ed5b4bSclblbdde56lfl7pr15238cl
4180-20OdddSeO3"

170 DATA "7ja<l)U(Jr5*04iJill91104OOd
dJ9dd22055b2a6:5cadSb0S5ba7ed524
44dfbEdbbQ35bedbO2a035bed5b055ba

7-dS2=bcdd f 7rlr''cd6bOdcd<.d 1 *3e'l<i»d

7S7d797d72a595c"

;80 DATA "7700ed5b4b5cl313«7ed5
2dQ2aab5c4A-|!»Wa0c*.40477oo6e0-r-o6
0200B78d71 1060019iQ53fea0200c78d
7237efe8O38+9d68O18e9fee0200d78f
?>?<»* ~ri7-f t rt7t 1 XZ"

290 DATA "5986001 9 1832-feB020 107
8c73e28d/3e29d72356235623191Blef
e40200d78d73p?«rl7?3f,p?3FiA197:5Lmo

d78d73e24d73e28d 73e29d7 1 6ebed5b5
9^c 3e06d 7 J b a 7ed "

200 DATA " 3596521 938893e0dd/3e4
dd73e65d73e6dd73e3dC72a595ced5b4
beca7edG2444dc?OOOO0OO0OOOO0OOC'0
OCOOOOOOOOOO^OOOOOOCOOOOTOOOOOOO
OCOOOOOOOOOOOOO"
9994 CLS : P=*1NT '3) Renumber"'"

2) Rem!;ill 3) D<?lete"""4> Van

able list 1 : INPUT -f-ff: LET rzz=<

3127<> ftiD *ft = li+i3.2i.>6> s t AND fff =

21+C32245 AND -f -f -f ~3) + (32412 AND

+++=4): IF NDT 22i THEW GO TO 99

94

"995 LET ttt=l: LET ff--li IF zz

£-31276 THEN INPUT "Start " : f f f .

"Steo "sttt

9<J96 IF 222=32245 TIEN INPU" "Fr

om "; r tf , ' Tu " . L L .

9997 IF *-ff >9999 OR ff*<i OR ttt

>999^ OR ttt^l OR (ffOttt AND z
= Tr--?P15» TflZN GO TL , 7'774
9^98 POH^E 23300. INT (f + f/256>: P
Or.E 23299. fff-256*PEEK 233O0: PO
kP 9^302, INT tttt/2S*>i POKE 233
01.ttt-256#P~FK 2-302: IF zzz=32
412 THEN PRUT USR 22 2 : STOP
*=r99 RtV>jnnMT7F IIRR TTT

V^UR COMKJIt-K, AKHIL H*«4 tbl

Just the thing for
these long winter

nights

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K\i-itiiiUi;a

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SHARDS SOFTWARE

The family favourites

^W^^rW^^^B^^^ffl

i W

Available from Boots and all good stockists, or by
sending c|iecju«?/P.p). to 18° Eton Road, Nforri,
Ks.wxIGl 2JIQ.

152 YOUR COMFUTER, APRIL 19R4

Listing 2.

10 DEF FN x <a*>=l6*(C0DE a*-48
-(39 AND =>S (1 > >"9") : + <C0l>£ a*'2>
-*S-<39 AND a*<2>>"9»)>

SO CLEASl 64040: PRINT 'Poking
in p'ocress": LET x=64048

30 FOR a=0 TO 20: READ a*: LET
t=0: LET tl=VAL a*-: TO 4): LET
a4=a*C5 TO )

40 FOR b*C TO 63: LET v=FS * (a
*ib*J-tl IU b*2+2>>: LET t=ti-v: P
OKE «. v: LET X*X+1: NEXT b

5ft IF t=tl THEN NEXT a: PFdNT
"Finisted': STOP

60 PPINT "Error in line ":100+
a»10: FTOP

JOO D£TA •790'.cd3a-«acrJ9a+ccdeO-t
ce92a525ced5b4b5ca7ed5219cB2be5d
del23222323237efeOe200£>232323232
3237c feOdSQlLif «e!2B24f ai-3ZQ20f e-e:

c2Bl-feed2818*e"

HO DATA ,, 7050f02B14f=f72BI023I
8c 5ed5b4b5e lb lb«7ed521738iLl 1.9237
e-feOd2apd-e3a28be+e0e2v>O72323232
3231 3eb*e303806-f «3«3002 1 8e 1 ddeSe
ddbOdcdcd I -F 21 c7 "

120 DATA "657:fa7tHe0:J2B04d7231
S*7ddeldd4601dd4eu2cdlal £ clc9160

0f0n.^A1AH?77<a^072A!5AB73^bt2i5-22
0tc696e&5200d3eff 18023e2-fa73ced5
230fbl9c9e53e0a"

130 DATA "7368*71 I enfr.prK? 193m 1
33da7 1 16400ed52 1 93O093da 7 1 eOaedS
270O I 3de 1 c9e5e5eb1 31af <?0e20- a7bc
6i,5300ll4S*eld5eba7ed527cdieic9e
511e803a7ed521?"

L4U DATA "488«?3O131164O0a7ed521
93O0-? leOaa 7ed52 1 9300f 1 9 1 4cde34au
2C31l64OOcde3-faO2;>31e03cce3-a02O
37dct»3O02033e0e02;i3 , 5702030203et7
d C7037c02039702 "

150 DATA "882Bc9fd2a535c-fd2b+de
5cl-fd5e03-fd560^13131313-fal9-rfe5d
la7ed52193QiaBcS+d3lc91o0C5f fe0a3
SOI 15cde3+ d + dfaautt d*e<i3 1 S+d .'4U4+
d/503-f de5e 1 d5dci "

160 DATA "B55Bebdla7ed52l93004d
lddHrW lc9e3CCOefft472aOC3t)cded +
ae 1 e5bB2B: b9023-f 5=b2a6 I5ca7ed574
44dfe2<bbBd44S530O1246fedbCf lcd93*
UZuOOSUl 103ed2B - '

170 DATA "7747-fbc9e5cetOe-fb472aO
OSbcded+ a e 1 B5bfl28;»7'i023f Eeb2a61 5

c o7trdS2444d 1 7D45d833001 1 43f edbQl

Bcbe5237efeOd28lOfe3a28Oc*e0e2SO
a-fe3l>38044e3a38**

1G0 DATA "7l77ea»t«r9272"3235e:23S
6dd6oO Idd6e02a7ed52 1920ece 1 eScd7

Ifb3a025bfe002005cdbe*bl303cdf2f
b?123c92a535c232323237efeOc?8??;f
en B 200423231Bef "

19C DATA ""'770f«N='17S14<ee52SlO-f
e?c2B0c-f eed2B08* e+ 02804-F ef 720dac
dl »f c 1 Bd5ed5b 4b 5c 1 b 1 b£7ed52 1 938c
6:9*3-Mebdd2a535cdd2to3eO032025b2
lX)C022O05bcd5c"

20C DATA "B14Ofc2a0O5bdd74O1<id7
502dd5eO3ddb6O4dd 1 91 1 0400dc 1 92au
05b2322OO5bdde5eledSb4b5clba/edb
21 928d2*de 1 * bc9f Zi ds52a4t>5r2b?hr
d71fbfdeSddeldd"

21C DATA "715O4eu2:id460l2aO35be
a^DCsbov ( j v<,>bb'/20+ baB20-f 8444rted4
3005b3e0132025bed5cfc2a005bdd740
idd75O2ed4brtS5ba7ed4222O05bdde5e
1 2bcd71 f bf de3dd "

22C DATA " 7633e 12a?3fbed5b053ba
7edS2ed5b005ba7pr!52192ucb + delfbc
: ?2o4Li5et:d5tj535c:131313a7ETiriri9dBd
d2oLi;-L.udd^bddebe!23?3232T.277ele0
e2O0323i Bf 3-f eea "

230 DnTA "70S02014f eCd20cfr?5dde
Icd5b4b5c;lblba7ed521938dcc < ;dde5d

H313131J.13a7edS219283501O0002b5
45d03 J 31 a f eOd20* 9ebeOUCiZ 1 O0»OO«*7e
d42ebdd6604ddoe"

240 DAT^ "B199c.319dd7503dd7^04c
de3fdcla7od52444do:«.'dbOtldc5cl ISO
SddeSe 1 d J5t04ddSeO3 1911 04051 <?dde
5d 1 B5c5eba7e»d52eb 1 8d52a^b5r 1 9224

b5r7'r»S9F;r 1977W

753 DAlft "690 15c2a6 15c 1 9226 )5cc
"dd2a535cdde5e 1 «dSb4bSc 1 b 1 :>a7e?d5
2d(Jdd2b2a035bdd5eO?dd?56Ci1ptia7priF.
2 1 9pb30 1 cdd5e03dd5604dd 1 91 1 O^OOd
c)192d5b4b5clblb"

26^ DATA "7322dde5ela7ed5238d4c
9dd22C35b2aOS5bdd5e02dd5601eba7e
d52i 9eb30 1 drld5e03dd5604cd 1 9 1 1040
0ddl9Ec15b4b5c.blbdde5(?1^7Gd5238d
'■1BD*200ddd5en3"

27 j CATA "77;8dd5604ddl9110400d
dl9Jd220S5b2at»l5cedSbr)55ba7«cb24
44dt?bi=d5bO35bedb02a035bed5bOE5bi»
7ed52ebcde3*dc9cd6bOd=dcdlf3el6d
7<»7rj7<j7d72aS95c-"

280 CATA "7700ed5b4b5cl313a7ed5
7d82a4b5c463eH : a0c640477eebeC+e6
0200878d7l 10600191 853feaO200c7Rd
723/e+eac»3ef 9d6Si:< 1 0e*?f eeozood78f
53Bf3d7-fld71 1:3"

290 DATA "59Q600l91832feB02C107

Bd 7 Je£Bd ^3e2907233(?Z3j<i23 1 ? i g 1 e'

e4020Cd78d73e?4d7235e23E6 I 923 1 80
d7Bd72e24d73e2Sd73e29d71Beberl5b5
<55c 3«*0i»d 7 1 ba / ed "

305 CATA "547952 l < ?38393e0dcJ73L")
Cd73e65d73e6dd73e3dd72a£95ced5b4

b5ca7cd52444dc997 7 ;7&lbC'31 sOC3oO

03c42427e424200007c427c424?7cOOrt

03c424O40423c00"

9994 Tl R ; PR'NT "l> ^tnimhpr" ' •

2) ^errki;i"'"7> Delete 4> <var:

rble list": INPUT *f+: LET zzz=:
i404B AND f-f* = l) + (64S41 AND ffi =
2> + (6=017 AND -fff=3)+<6E184 PND
4*f=4): [P NO" zzz TH£N GO IT 99

94

= 995 LET ttt = :00: L FT -f-f-f=7tt: 1
F 2:^=64048 THEN INPUT "Start ":
■»ff,"=t*?p ";ttt

9996 IF :zz=65017 THE^I INPUT "Fr
om ":+**. "To *:ttt

9997 TF -■f-f>9999 OP. ff-f'T OR ttt
9999 OR ttt<. OR «fff>ttt AtvD :

zz=6SC17. THEM GO TD 9954
9999 FriKE 23300. INT (f-f-f/256): P
UKt 2^2VV,ff + -2b6«l J tL-; i^-MJU: HO
KE 23JU2.INT :ttt/2&6>: POKE 233
01 .ttt-256<PFFK 233021 IF ?zz=65
1B4 ThCN FF\IN~ 'JSF\ ZZCS STOP
9999 FANDOM1ZE USR zzz

(continued t;on- page 15 1 )

remove til Lnuscd sections of p tor rams.

The final routine is a variable list This
routine when callol will list all die variables
used by the program so far and how nncb
total memory if being ueed.

The routines together take up abooi 1300
bytes, To enter them, type in listing 1 — for
the 1(>K version — or list.ng 2 — fcr ihe 18K
version. When run these programs Poke in
i hi: machine c<*k* from hc.\ data s:atcnn;nt5 f
above Ramtop. Run ihe prcgram and if the
program reports finding x data irror, correct
th. ofiendiag lins aid Return uniil the
program prbis "finished".

The routines should now be tti place and
er - or tree — a .-he^ksum checks each line —
and sn ihe data is no longer needed intl-so
should be deleied. However the toolkit ;an
help you here. Run line 99?4 ;;nd type - in
rcspoase to ihi: menu to select the bljek
delete. The computer wdl then ask for the
first and last lines to be deleted so tvpe 1 ihen
1000.

The routines should new he saved using
SAVE '"OOLKIT^CAVC "CYTCG"

Listing 3.

1

RUN 3

."\

FOR *=:

'. TT 4: MFXT

a: DIM a

4(3,2): DIM

x (7)

10

PRINT '

hellc": REM

title

17

LET 3*""strino vari

able"

20

60 SJB

1O0: RESTORE

10: LLI

ST 17: LIST

ton

30

80 TD ;

♦ 100

lOO

LET z=l

: RETURN

no

REM the end

CODE 3 1276. 1300
for a 1'iK Spectrum or

S^VE "TOOLKIT":SAv'E "B V TFS"
CODE 64048. 133C
"ot a 43K Spectmm. Trj load she program in
Mature type

LOAD" ';CLEAR 31 270 LOAD '" CODE
:br the 16K. Spectrum or

LOAD " ':CLEAR 64C40 LOAD "" CODE
:br the 4SK Spectrum.

II" you now iype in lis inj; 3 — do not delete
lines 9994-9999 — you may lest out the othi:r
rou.ines.

Run thi toolkit Run 9994 — and

ihe menu \v\Il be printed our, You may
notice fuiui i Ik lisiit.g tha: ther; are a

cjuple of unnecessary Rem stite-
tnenis so why not delet; them. In
response lo the menu type 2 to 'er rh**
Rem delete. U" vou now list thj program
you will see the Ren staiements have
dukiijtpcatetl. Renumber the program.

Typ« GMO 9994 and in respense to
i In- liii-iin t % — ii' I to get die renumber
routine and then in response to ihe
protnps tvpe the lowest line number
you want, 10 is normal, and to the
second prnmpt type the Mcp between
successive lines. s,gsiin 10 is- normal,
Immediatciv the message

Car"tr5nLmberline30
will appear. If you list the program vou can
see I he problem — line 10 h?s a Goto
calculation. Delete line M — jrou could
always replace it laier — and again type Goio
9v9 1 and type n the responses as hefore. You
may get an error message when renumbering
is compete. It should be ignored.

To lest tic final routin: i>t>c Goro 71 ati\ in
response to the menu type 4. The variables
used shnuld bj listed on the screen and the
total memory printec at the bottom. ■

YOU=t COMfUltrH, AKhIL iy»4 1 b3

Blast off to ADVENTURE

C»«»lta*

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Create ar.d solve ADVENTURE
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1*^ CREATING ADVENTURES ON

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FderShaw and Jarnes Morileman.
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•JciiriLc them ind connect roues between them. You may then fill them
with object; and problems ot ^our choice, Having tMted your sdventure
you may alter and experiment with any section with me greatest of ease ,
A part hi mica adventure may be stved to tape lor laler completion.
When you have done soTHE QlllLL will ollcw you to produce a copy of
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PKSPKTIVE AM
PROJECTIONS

IN i PREVIOUS ARTICLE in the February
edition of Your Computer I gave a method for
drawing pictures of three dimensional wirc-

ohjuctKOn the screen of a BBC micro. I looked

at the simplest type of projection whi;h maps
■i 3-D scene onto a 2-D screen. Th.s
orthographic projection has the property that
parallel lines n 3-D space are projected into
parallel lir.ee on th« screen. Although very
useful, sucn views do took odd! Our brairs are
tised to the psrspective phenomenon of 3-D
space, and so they attempt to interpret
orthographic pictures as if they are
perspective views and eo they look distorted.
So it is essential to produce a projection
which displays perspective phenomena ie;.
parallel lines should meet on the horizon: an
object should .appear smaller as it moves iway
from the observer. The drawing board
methods devised by artists over the centuries
are of (to value to us. Three dimensional co-
ordinate geometry, however, furnishes us
with a relatively straightforward technique.

A perspective view

To produce a perspective view ws introduce
a very simple definition what we mean by
vision. We imagine every visible point in
spac; sending out a ray which snters ihe eye.
Naturally the eye cannot sec al. ofspj.ee, it is
limited to a cone of rays whi:h fall on th;
retina, the so-called cone of vision, which is
outlined by the dashed lines of figure I . Th^

aKifi of thi* cone Ik culled the straight o'.iead
ray. We imigine that the eye at the origin and
the straight ahead ray identified with ths
positive z-azis of our co-ordina.c system.

Figure 1

We imagine the screen — which we call the
perspective plane — perpendicular to the f.xis
of the cone of vision at i distance from the
eye. In order to form the perspective
projection we mark the points of intersection
of each ray with this plane. Since there are an
infinity of such nys this appears to be an
impossible task Actually the problem is not
that great because we need only consider the
ra*s which emanate frcm the important points
in the scene eg. the vertices a: the ends of line

segments. The final view is formed by
drawing lines between the projected points on
the scr;cn in exactly the same way a* the
equivalent vertices are relaied in 3-D space.
Figure 1 shows a cubs observed by an eye
and projected onto two planes: and the whole
scene is also drawn in perspective Two
example royr. ere shown: the first frorr. the eye
to A, one of the near comets of the cube
relative to the eye, and the second to 3 one of
the far comers of the cabc. The perspective

te<

Listing 1.

■ '■111. N f • I | II. .-

1JQ11PU- MMch MODE "nUMD i HIDE NWD
1201HFUT HC(Vl?-,«Ofii: = veBT-J.rtCfil 1/4
; I0P\OC*-.*rtl !.<it
HOFiOCsctcr.qiri K3fi:i/r VER1/I)

I AIM VII

.■ f .-t- ■ <.... / rotate «#ac« *buvl * tiunv •*] a*lc

351O05F PROCu«»rullP> PY ,Tl ,0> .OV ,07 ,&«**>

39Q4P iocl» jii3'-p « -Fi.-pr: ■ -~:-. . -

5»<I0A_PHA . FN4jh| iuUX.tJH

S.vSuf'Ha f M ■ i Allltf*,' : HttKJrtultv

;*6oeetA-FNjniic«!z > sop<o:»o«-<o\f«eii'i i

CWOFWCr «l.3l-BeT»,2> = Fill.. ,7.. , I
WM^u^')OM>»rrH ( ii I k*vl,-t*. j t ^
;.*/rCHCCr«t-<3eTA 2> I PBttmill'S
SICO^tOal-K^-PH*. Vl : ll«yMt.'.

•vi K»-iiii:tT.n;tf'x,pY.F:) i ptxxmiHi

UiK*tfn 1 717):^ t t.j . - ■ j . - .i'--.-.ii
S210KF FfCCIill.:

&2<x.dcal rx,f»,r;,rHtrA

■SMC* = IWUI"rE»,l- > Ejr",E>,EY , ,EZ

9240l*MT-<vX.DY.M>".DX.(V,M

nr*iMa««n»i-l(X.-lir -\>t I »«0C«ult3

WWH-E»-I» I PY-EY-PX I FZ-»£I-Di

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eec*THErA-FN*.ui»:Fj .oisr

BJI<*"KX>'?t J'i*l-TMtrft,2l : PROOwjltS
B320DIET-»DROlGT»DIS-*F2.FZl
85J«T-«Ta*Na.,9l»:Cia-*FI -FY'FJI
Il'.4im'[li:nt '.(IIII r»,.ll ) I'ltllljnu) t3
USMUMKC »r.J(0,ODIG-l I PR0C«ull3
STot'EHDPRJC

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Q£.lOCCr ffUli:. iI^.tIt Iri.^n,.;

ubiouicriL nxi,nX2,CT,si

8630M i -- in > ] s ndL >!.i
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napQ#UAYI3,AX]3}~l i k iH- ,-., M - . ■-..
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■i'i-i-ii if.:r..q:c !,-■.■:, .•.»■■
UD201F ft!StftX>vo.»OOl THtH 8UO
6930 IF (Kiawco.juml IKN — >
I114UII (Hid 1 K£N -1.0«F1

aaso.pii's

flHr.cu ak<;» t-en •CMM(WMI>tni ELBE

ICiQOFEM tTJn7

■xikmu rwoct-»nS(T*,rv,iti

'>««i|,|. i i 0(1,2)0 : .->.!:■■

vi.V>ntJ,l>'0 I A<2,2)*1 i A(Z,3>*.0

<»4q*i3,1>-0 i A<J,Z)«0 i At J, 31-

W80P<^,1>-0 I ft<1,2)-0 1 A(1,3I»0

'*J40ENDFFCC

^lOvflcn ji-.ii !.'.

Oin)ai ITrOl^rvjI t..\

■)i?ou)C«. ix.jjt.w.,wt
?]30Pcn rx-i ro 4

514C*-f* JX-I 10 4

ei&0={« *x>l TO 4

4l76A'r*A*ll At lit t KXIH(rc<% r ,ltl
MOCACXT Kf.
?190H<IX,J!C)-A«i

r .'.*;>i»«xr a/.

«K*EXT IX

«^AKJO,A>7>*C

AIAXI,AX:f-(l

*(AX:,AXI)<C"I

-nTN<AT/AXi

! *<l,')iT>
I »<2.*1«TV
i (i(',*)-Ti

1230FDR IZ*l 10 *

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■.J4..,|. : ;:■.,.•:. -ii ■ :: ,.:•..

■;23ojexT jx

"iZTOEHOI'ltli;

■ ■. ^r 10K3

S.'tOIEF FAOC.dR-

^320f.l|,l)-l I ft<l,21-0 ■ «<l,J)-> : tcl.il-0

■J330FII2,I)*0 i Bi/,. , ll ■ R<2,J)-'> ■ «'2,(l-0

•,14«.l J,]I«C) I Htt,VIM> 1 RO,3l"l I K<3,tl'0

«i*W*tX^, U »V I M14,ri»V 1 Klt,4i-i : *t'» I *i-i

^4<K«M linrto

MIMEF eftOtMln«D(XPT.ypn
?4?0I»AW FN*<XPTI,FNy<YPT>
V43O0NIXPPOC

»W.r>REH ,.,,f...

"StOCCF FKDnruv»Ui<XPT,VPTl

'■SZO^Olt FM« ,'XP!l.FNv<VPT>

»53MN0PF0e

■"(iLHiltn kHlunqlll

"f,|IH II I HllC-rtrin rji nl FHOfl , YltV.f >

•6ro>DRiEJXOfiG*xnDve t vmiu-vimrnvwivr

°r,30FRnCrnva<u I0,0»

"b+otNOPr-ac

•7o0FEn «t»rl

"7Illirr IIIIHX^rl IB,F>
•7Za>UHlE«> ■ VBIllG-U
•7-0KPI>-J2E0 . HVPlX*fl6>

•>;40»VSWl.F-«XflX''H0filI : ySCAi.E*MVPI</VE*T
•750 JF XISCAiE/veCALE Tr*t XYBCALE-XB'aLC
»7AO\JKJ30, 0,1,39,6 i VCU24,C>| Oil 279(939)
•T/OECDL 0.H12B : Cxt. : XXI O.F

'TaocMCPPOc

*<K-Of£rt r*»,tl -tti-pi kwI (mictions

°8 lOICF FNX < i) -^r < ' >W tC»7 1 *X X3CALE-J. SI

♦STrttfl (NV<;i-l\T<(yQRtB-Il«VBDflLE»5,S!

1 56 YOUR COMPUTER, APRIL 1 384

norrv

I O Angel! considers ways of producing perspective projections on screen.

c

Listing 2.

6000REM scenes / cons: sting o< a cuse

6O1ODPF PMBCmemrmlX

6020D1M X<8> ,i (G) ,2(8' ,XD(S) , VD<8)

6030DIM i IW(2, 12) ,6<4,4>,EM4,M ,R(4,4>

6040N0V=0 i tOL=0 s PPD=3»VERT

6049REI1 place CUBE in SETUP pool t i o i

6050PR0Cidft3 : PRQCobject

6059REM find OBSERVED position.

60&i>PR0CiiJR3 : PROCluuk3

6069REM draw the scene

6070PRDCdr»wifc

6079RPM rnpoAl

6030GOT0 606O

6090ENDPR0C

650OREM object / add to data base

651 ODE F PROCab ject

6519REM d«-ft for a CUBE

6520LOCAL IX,KX,YY,ZZ,L1,L2

^sr-ODATft 1,2, 2,3, 3,4, 4,1, 3,6, 6,7, 7,6, 8,5, 1,3,

2,b, 3,7, 4,B

6540DATA 1,1,1, 1,1,-1, 1,-1,-1, 1,-1,1, -1,1,1, -lil
,-1, -1,-1 ,-1 , -1,-1,1

6550RESTORE

6559REW r.toro line in'oriiation.

6SSOP0R IX=1 TO 12

6S70READ LI, 1.2 : NOL-NOLM

6S30LINU ,N0L)«L1*N0V : _IN<2,N0L> =L2+NQV

65?0hEXT IX

£*S7*?nCli store; vtrr Lvn mf jr nmLiuii |juL ill f.u^iLiun by m
4tnx R.

6600F0R IX=*1 TD 8

6610REAL X)C,YV,77 i NOV-MOV+1

6620X (NOV ) =R ( 1 , 1 ) »*X+R ( 1 , 2 >»YY+R 1 1 , 3) *Z Z+R f ; ,4)

6630Y<N0V>=R<2,l)»XX+f»<2,2)«YV+R:2,3>*ZZ+R<2,4l

6&40Z<NQV)-R<3,l)«XX+f»<3,2>#YY+R:3,3)«ZZ-»RC3,4)
■■•'- < •■* > IX

66bOENDPRDC

7O30REM drawn

70i0ccr rnocdroHit
7O20L0CfiL IX,L1,L2 : CLG
7030FOR IX- 1 TO NOV

7039REM put vertices in DBEERVED poaitlor, then Mks
PERSPECTIVE trans-formation

7040IZ=3 ( 3, 1 ) »X ; 1 /.) *fi ( J ,2 ) * Y ( 1 7. ) +R 1 3 , 5) *Z ( IX) *R ( 3 , 4)

705OPMU..1-PPD/ZI

7C'fatiXD<IX)=<f>U . 1 >»X(IX)<-ftll ,2)»Y<1X>-RU.3>*2 (1?.)+R(
1,4) )*PMJLT

7070YD(IX>=<RC2. I ) *X CIX)+Rl2,2) «Y< IX) -R (2, 3) *2 <I%>+R<
2,4)>*PMJLT

/CoONEXT IX

7CB9REM draw lines of scene

7090F0R-IX=1 TO NDL

7100L1— _IN( 1 , IX! i L2-L.IN <2, IX)

7110PRO~movetoUD<LJ ) ,YHL1) )

7120PROi:iinetotXD<L2> ,YKL2> )

7130HEXT IV.

714OEND=R0C

Listing 3.

6OO0REMsLtrne3 / consisting o+ 2 simitar objects

6O10DEF PRCCscens3

fe02'>DlM X<16) .YU61 ,Z<16) , <D(IAi ,VI)IAI

&O300IM LIN<2.24> ,fl (4,4) ,B(4 ,4) ,RC4,4)

6O4ONDV-0 : NOL=0 : PPD=3*VERT

6049REM place first abject in SETUP position

6050PPOCidR3 i PROCobject

£059REM place second object in a peculiar position

tO60PFOCi dR3

6070PPaCrat3(P 1/5,1) : PRUCmultS

6080PR0Crot3(PI/b t 2) : PR0Cmult3

eO90PROCtran3 '3,2,2) : PROCmultS

fclUUHNULOD ject

6109REM speci-ty general rotation

6110PRDCidR3 : C_S

6120INPU-" (PX ,PY,PZJ ",rX,pr,ri

61301NPUT" <QX,QY,QZ) »,QX,QY,QZ

61401 NPUT "GAMMA " , GAMMA

it BOfTOCgeni at <PX , PY , FZ ,QX , QY, QZ , GAMMA)

6159REM OBSERVED pDsiticn

6160PROC]aok3

&1&9REM draw the ■ C H OW

6170PRDCdrawit

6179REME0R draw another picture

61 SO GOTO 6 HO

6190ENDPRQC

projections of these points onto thu near ?lanc
are A 1 iiid B\ and onto the tar plane A" ar.d
B a . Note that the projections will havs the
v\me sh:ip- ;md orientation,,, but they will be
of different sizes.

VC'e let the perspective plane be a distance d
irom ihe eye — variable FPU in later
programs. Consider a point P ■ (x,y,z) in space

'vhi;h sends 2 ray inu the eye. We must

calculate the point where this line cuts the
view plane — the z = d plane — suppose it is

the point P'Wx'jy ',<:). Let us first consider
the value of" y by referring to figure 2. By
similar triangles we see that y'/d = y/z, that is
y l =y.d/2. Similarly x i = xdh,. Hence
P'=(x.d.'7.,y.d/7.,d). and we have th; x- and y-
co-ordinates of the projection on the screen.
Many of the routines needed to draw a
perspective view of an object are t.ne same as
choee required for the orthographic
projection. We lump them all together in the
library of routines given in listing 1. It

contains the routines Start, Setcrig.n.
Moveto, Lineto and Real-10-pixd functions
necessary for manipulating th* screen of
pixels as though it is a window on r«tl 2D
spice.

It Am contsini routines Angle, Roi3,
Trin3, Mult3 and ldR3 for rnan.pu.ating the
matrices that represent traasfcimations of 3-D
spite ts well as Gcnrot which create* a mat'ix
that represents :he rotational transformation
of space about a genera, axis, and Look3
which enables the observer to look from any
point ,EX,EY,EZ) n space toward any other
(DX.DYPZ;.

Use of matrices

If you wain to understand them fully y»u

must refer bsck to my previous article or read

Advanced Graphics with the BBC. Modal H

Microcomputer by I. O. Angel, and E. \. Jones

ISBN 333 35052 9.

In o:dc. to draw a perspective view we must
now create a Scenei routine which calls other
routines to calculate a vertex/line Juts base
describing objects .n the scene — :he setup
positions — uses matrices to move each
individual object into its aciual position in
spf.ee, and then again 10 move space into the
observed position where the eye is at the
origin looking aking the positive z-axis, ready
foi tht perspective piuicLUon achieved in the
(continued en page J 59)

YOUR COMPUTER. APRIL 1284 TS7

Joystick and
Interface

for Sinclair Spectrum with these
features to give you endless hours
of enjoyment.

1 Super rinsitrve response fire
button.

2. Firm suction cups for stable
one hand operation.

3. Snug fit hand moulded grip.

4. Additional fire button.

5. Extra lonj 4 ft lead.

The Interface supplied with the
Quick Shot (tm) has a two joysticks
facility. *<

The first port simulates 6789 &
keys. The second port simulates in
(31 1 command. It will run any
Software.

J . Using keys 6. 7, 8, 9 and 0.
I. Having rediflnable key
function.

3. Using In |31) i.e Kempston.

4. Any Software you write
yourself.

. drrr

-■"■

1 1 1 1 • i i . ititmti

rrn

batfl
H 1 1 -J * i il 1 1 1 1

i LMJJ'i' , iiiI-

Light pen

The LIGHT PEN enables you to
produce high resolution
drawings on your own TV
screen simply by plugging into
the ear socket of your
Spectrum. The controlling
software supplied with the
light pen has 1 6 pre-defined
instructions. You can change
colour (Border, Paper, Ink),
draw circles, arcs, boxes, lines
and insert text onto the screen
al any chosen place, yuu can
also draw freehand. There is a
feature to retain the screens
and animate. On the 48K
Spectrum you can retain 5
screens. You cart dhu use the
machine code on its own in
your own programs, for
selecting out of a menu etc.
The LIGHT PEW is supplied
with a control Interface, to
adjust the sensitlvityfpen
alignment.

£19.95

Keyboard for

use with 3 Spectrum
or ZX81

Our cased keyboard has 52 a
keys, 1 2 of which form a
numeric pad. The 1 2 keys
comprise 1-9 numeric plus full
stop and shift keys, all in red, to
distinguish from the main
keyboard key i which are in
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the black case to form a very
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or Spectrum computer. 16K,
32K or 64K can also be fitted
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the case [81 model only).
The case is alsc large
enough for Dther add-ons
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be fitted, giving a very
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etc. can still be used.
Our ZX Professional }

keyboard offers more /
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available. /

■ co »»Patlbie

Spectra-
Sound

,i»i«i,

19 EM flB BB GB

noaciiaiia

The so-catted speaker in your
Spectrum is really un a buzzer .
With the DK Tromcs SPECTRA
SOUND" you can generate fully
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speaker on your TV set. SPECTRA
SOUND is a very simple but
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means that you no longer have a
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The SPECTRA SOUND fits
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£9.95

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Saffron WJlden. Eliex CB11 3AQ.

Teleohorw: (07"W] 24350 (24 hrsj 5 lines

= ^=BHi^H=

Plctiveitrrt-lriit ©£

Pltasesencf me @ E —

PIMM J dd on £ t. 2 £ for posu repacking.

I enclose cheque/PO payable toDKTronics total fc

or debt my AecessfBarctaycard No.

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Send to: DK Tronics Ltd.. Unit 6. Shire Hill Ind. Est.Sal'ron
Walden. Esse< CB11 3 AC. Tel: (C793) 26350 (24 hrs) 5 lines

Lining 4
600^ftE-M scene3 / a let
600DEP PRL!i:scene3

602JDIM X(74> ,Y('4),2<74> ,XD< 74) , YD<74>
603JDIM LiN(2,92.' ,A(4,4) ,B<4,4) ,R(4,4:
6039REM place JET in SETUP position
A043PRDCjet
6O4?REME0Rspecif v general rotation

60S JKHUUl dKvl : ULb

6O60INPU"- (PX,PY,PZ) ",PX,PY,PI

6073INPLT" <DX,QY,QZ) " ,nX,QY,QI

6OBC1 If^PU" • OAMMft " , QAMMft

A093PROCgenrot (PX , PY , PZ , CX ,QY . OZ , GAMMA )

A099REM OBSERVED position

6l05PROClaQk3

6109REM draw the suene

6U3PRDCdrawit

6119REM repeat

&12D60T0 605O

6130ENDPROC

6503REM jet

6S13DEF PROCjet

6b2JL0CAL IX

A53DDATA 0,0,60, 0,0,64, 0,8,32,

a,y,i^, 4,-*,J2, 0,8,-32, 4,B,-32,
4, 4,-32, 0,-4,-32, 8,0,24. 48,0,-32, 8,2,-32.
0,8,5, 2,B,-32, 0,32,-32, 2H,-4,-24, 30,-2,-24, 3
2. T. . 24, 34, 4,-24

A540DATA 32,-*, -24, 30,-6,-24, 26,-4,8, 30,-2,8.
32,-2,8, 34,-4,8, 32,-6,8, 30,-6,8, 31,0,-24, 31,

-,-24, 31,-2,-12, 31, 0.-12, 0,& T 40, 3,4,40
A5S3DAIA 1,2, 2,3, 2,4, 2,5, 2,6, 2,7, 3,4, 4,
9, 5,10, 6,11, 7,12, 8,9, 9,10, 10,11, 11,12,
12,13, 14,15, 15,10, 15,16, 14, 1A, 17,18, 17,1V,
18,19
6b60DmA 20,21, 21,22, 22,23, 23,24, 24,25, 25,2
0, 26,27. 27,28, 28,29, 29. 30, 30,31, 31,26, 20

,26, 21,27, 22, 2B, 23,29, 24,30,
T3.34, 14,35, 35,32, 3A,X7

25,31, 32,33,

6570REST0RE 653C :
6579REM SETUP vert:
)
65B0F0R I7.= l TO 37
6590 FOR I7.= l TO 46

NDV=74 i
ces end

NQL=92
1 ines -t Dr

■first side ( X >=

READ <(17.),Y(I'/.),Z:iy.) : NEXT IX
READ LINU . 17.1 ,LiN:2,I7.) i NEXT IX
■5 end lines -for second side ( X

4,8,32, 8,4,32,
8,4,-32, 8,0,-32,

6S99REM SETUP vertic
=0 )
6600RESTORE 6530
&610FOR IX=3B TD 74
6620RtAE XlI7.) ,Y<IS) ,Z(I7.J
&630NEXT 13!
6640FOR I7.=47 TG 92

iiliSOnCAD Ll ,1,2

66&OLIN(l,I7-)»37+L.

6670NEXT IX

6680EMDPR0C

700OREM drawl t

7010DEF PROCd-amt

7O2OL0CAL IX.Ll.L2

7029REM put n OBSERVED position

7030FOR I7.= l TO NO^

7040ZZ=fiC3.1)»X(I7.:+R(3,2)4Y<IX)+R(3,3)*Z(I7.)+R(3.4)

7050PMULT=PPD/ZZ

7060XD(I7.> = (R(l,l>+X<iy.)+Rtl,2>*-Y(I7.)+R:i,3)«Z<I7.)+R*
1,4))*PMULT

/U/OYJi:7.)MK<2,l>*X (17.)+K(2,2)4-Y<17.)+R:2,3)*Z<I7.>+R<
2,4))*PMULT

i xux.>=-x(u>

i LIN12,IX)=37+L2

CLX-

70G0NEXT IS
708-7REM dr nw
7090FOR 17.= 1

i;l ii-'i. t

1 i nt-3 uf

TO NQI

7100L1=LIN.1,I7.) : L2=LIN(2, IX)
7\ 10PROCmovet3<XD<l 1 ) , VC<Ll > >

7120PR0Clinet3(XD(L2),Y0(L2) )

7130NEXT IX

71*0ENDFR0C

Icontinucc from page 15/)
Drawn, routine.

The data base wi.l onlain information on"
NOV vertices — their X,Y ar.d Z values and
the.r projected values XD and VD — and
NC'L lines, Pht l'lh line joins ver ices and
indicia UNtl,l) and F IN : (2,1).

The on.y diftcrcr.ee between the program
which draws a perspective view and that of
the orthographic view :s in the calculation of
the co-ordina:es at the projected image on t.ie
screen. Unlike th.- orthographic,, ir. the
perspe:tive projection the ;o-ordinat.-s on the
screen carnot be iduntified with the X- fnd y-
values of :he po.nt in observed position. Wc
need id store the perspective trtnsbrmation
of die vertices in the arrays XD and YD so as
not tc corrupt the data base for future
projections The lib. vertex (X(l),Y(li,Z(I))
in observec position is ptojected to
(XD(lJ,VD(I)l. The values in arrays XD and

YD are given by

XDil) = X(l)' PPD,'Z(I) ano

Y0il) = Y(l)*PPD,2(l)

for 1=1,2 . . NOV

The value of PPD u set to 3*VKKT in

Scene?.

We Ntill need to cxplan i>ur value or PPD.
You can see iron, figure 1 that different values
ot PPD produce pictures \>i ditlcrcm skes —
which one do we choose? Is there a correct
value. If *e coDsidei die practical siiuition,
we note that the observer is silling in from of
a television and the perspective plane is
identified with the plane of the T.V. screen.
Normally the observer is silting at a distance
which is about ihiee times the heig.n of the
screen from the terminal.

In the scale of our trapping 1'ram the real-
world to die gtajhas area of pixels, this ia a
distance 3*VHRT. If we choose PPD greater
than this value it is as though ve are creating a
clo!.e up, md if PPD is lest than 3* VERT we
get the smaller ma^e cf a long snot.

If you mcigc bating 2 willi lisii.ig I yuu gel

— ;

PL .

3^CP

T

-

■

r FR

e

i

\

,,-

""

/ -Xli

t

^*

e
[

z

Ll)
lu

at
cj

d

program I whkh, when run in Mode 4, d.aws
a perspective view of a cube Try H0R1Z= 1,
(1:X,EY,EZ)-: 10,0,0) and (l5x,DY,DZ)=
(0,lJ,J). Here we are viewing the wire cube
from the front bui note that,, unlike th: ortho-
graphic projcciion, the back face of the cube is
smaller in pro eclion than the front face and
thai lines parallel on the 3-D cube need no
longer be. parallel in projection: in faci they
meet at a vanishing point.

Now ;hoosc (EK,LY,£Z)-(20,C,0) ie.. th.:
obse-vcr is still Icoking at the cute from the
same direction, but from further away: see
how the projection is ;he same shape and
orietttac.on as previously but it has Jirrinished
in skc, as you would expect with peisjeuive!
If vcu now return program 1 with the same
values of (E&EY.EZ) a^d ;DX,DY,DZ) but
with H0R1Z= 100 you will see that a change
in the size sf H0R1Z makej no difference to
rhc perspective projection) 5o juu cai. keep j
value of H0R1Z = 1 for all perspective
projections.

Now run the program with (3X,EY,E2) =
(.,0,3). It will fail. The eye cf the observer lies
in one edge of the cube., and i.nc pcripeaivc

tuijsfjiiuaiioii leads o a division by zero.
Theuretically, objects nay be positioned
th-outthcHit s>pace, ;ven behind the eye, how-
ever to avoid problems wc only consider
points with posit.ve z-co-ordinates in the
obscivcr position.

Mow run program 1 with general values of
(EX.hY.EZ)and (DX.DY.DZ) e?., (10^0,30)
to (0,0,0) : (5,10,15) to (0,0,0) : (3,10,15) to
(1,1,1) et:.

Listing 3 should be merged with lining 1

and the Object ind Drawn routines of listing

2, to form program 2 which runs in Mode 4.

Il gives a generil perspective view of 3 scene

consisting of two cube; that can be rotated by

an angle Gami.ia abuui an axis of rotation

which joins point (PX,PY,PZ) to
(QX,QY,QZ).

. J ro»ram I is formed by merging listing '1
with listing 1 and the Drawit routine of listing
2. When i un in mode 4 it draws a perspective
view of a jet. Trv HORIZ-1,
(PX,YP,PZ)=(1,1,1), (QX,QY,QZ)-(U,0.0).
GAMMA-1 with (EX,EY,EZ) =
(200,300.400) and (DX ) DY,DZ)={^0.0).
Then u v (nX,r-.Y,RZ)- v 3OO,4O0,-30G) etc.

(contnued on rext page)

Y0UF COMP'JTEB. APRIL 1984 109

(continued f;orr previous pace)

Perspective views arc all very well but we
have :wo eyes, Each eye should have its cwn
perspective view, wh.ch will differ slightly
from tha: of the other eye. This is the means
by which we appreciate the three-dimensional
quality of our world.

This leads to a problem; we cannot simply
draw :wo such projections because trie left ;ye
will not mly see the view created for it, but
also that made for the right eye, and vice
versa. Tti stop this confusion we must snsure
that each eye sees its own view, but only its
view, This is achieved rjy using a pair of
stereoscopic spectacles: a pair of transparent
plastic sheets, cne red — left eye — and one
blue — right eye. In this way the left :ye
cannot see rsd lines because they appear the
same :olour as he white background.!

Similarly for the right eye which cannot see
hint* ines, but red tines look black. So the
computer must make two line drawings of a
scene: one in blue for the left eye, and one in
red for the right eye: hence we have to run
using Mode 1 logically Anding the colours —
GC.ol 2 — nntn f whirr hirk»rrvinri.

So we wish to devise a method of producing
the stereoscopic projection of a ^ensral pant
P = (x : y,z), that is two points PL"(Xi,Jf|) lor
the left eye and PR=(x r ,y r ) for the right eye,
in the co-ordinate sysrerr of the. perspective
plane — see figure 3. Xaturall? the
perspective plane is the same for both eyes.
We will tssume thai the origin u between the
eyes, tha: space is in rjbssrved position with
the rlirerrinn of view fer rarh eye — the
straight zhead ray — is paral.el .o the i-asis.

Listing b.

PCtOM >->i\::r\r-i,*:i
/•••■::< IVM h,j-.,i 1 ,LV ■ 1:1 t
fc *xVi\i I l.J.J, J.|«,o ( c
/C4[)Cl»VIlf1«0,? i CCOL 3,2
■ 4'MMt cir*. I4qir« fcrtle. t- * t r ftt thr vie. * r M tl"
<H INIfighr *y» lh*(, thp .i»- irn* th,L-Ivle#L ly«

;»»>n jr.-i id -j
rct*o* tit t >_- 1 re Nfn-

Kt.'tian put wtlrn ( ■> OBESBVE6 pa.ittOY, UW ■ »■<•
Kf!ll1Ct:Vl lri>,lM<ili:n
7<70II-H<I, l>t:iltl«AI3,2)*l'(l( »«i!,s>»l(ix -*i;.<>

7(io>ccjxi-iH(.,i!»«(ixi»fl(i,:(»r<i>i*«ii,3>-r(iii*«i

i .') -ECifnJLT-EL

7ioOYCU5Si-<Ri:,»>«*uii*fm,2j«v<m«*a.jW(ii>»»'
2,0 > .milt
7H0NEXT ::;

7II9R£H drtt* l.n« of Ttic
7I20FCR l*-l TO NOL
7 :;.l.-.ih:i , ]-.i i LZ-L!N<I,IX>
TMOPFOCflOvetolX&lU! .TOtLlH
7t-;pfo:: inoiauD<L2i , wild :

71WHIJT IX
riftfflEII iwl rtw
7;7«€t— 6S i GCDL 3,1
7.B0*EXT JX

The eyes have coordinates (-e,0,0), left,
and (e,0,0), right: in :he program that fol ows,
c is given by variable CD, wh.ch is normally
about 0,2*VERT. Again the perspective view
plane is a distance d — variabh PPD — from
the origin. In rjrdsr to find PL we move space
by (e>0,0) so that P becomes (x + e,y,z) and the
perspective transform of this point for the left
eye .s ((x + ;:).d/z,y.d/z), which when we return
space to its original position becomes

Listing 6.

6030REP1 scenes / • jet

6010DEF PROCsc»n»3

6020DM Kl74>,y(74> ,1(74) ,>:t><74> ,YD<74)

&030DIM LIN(2,?2) .A<4,41 ,Bi4,-t> ,M4,4)

60S9REM .l.im JET in SE'UP position

&040PftOCldR3 i PROCJet

6049REM OBSERVER position

&030PROCIook3

A059RCM iraw the nil

£.Oi,0 "SPOOL P1CCY

6070CLG

6090PRQCdrdHit

6O?0»SPOOL

{(i + c).d.'z— e,y.d/7.). Sim.larly, the right eye
transfonnat.on produces PR = ((<-e).d'z +
c,y.d>7.).

Listing 5 is a Drawit routine which, wher.
used as a replacement in our first two
programs, draws a stcrt;>so>pic view of the
cube — program 1 — or pairs of cubes —
program 2.

For the best stereoscopic views it its best to
make the perspective plane cut on the object
being v.cw:d ic. if (DXyDYjDX)- ^,"!
then make y 7 (EX~ + EY-' + EZ-') = PPD
(=3*VERT). Therefore in the case of
st;reoscopic views we canno: keep IIORIZ —
and VERT — fixed, since for the best
piojc;ticn3 HOR1Z and VERT depends or.
(F.X,EY,EZ). For prcgram 4, formed in the
above-mentioned way from program 1, try
HOPIZ=10, (EX,EY,EZ)=(8,12,16) anc
(DX,DY,DZ) =(0,0,0).

If you replace the Scene i of program 3 —
the jet — wi:h l.sting 6, and also use Drawit —
listing 5 — you get program 5 for drawing a
stereoscopic picture cf the et. There is not
enough memory to run the program in mode
1, so instead we run in mode v, and the
program *Soools the picture onto tile Ficcy in
hfckhc srore. Then if yroi rlrar tie old
piognim and *3xec Piccy onto a white mode
1 screen you w.ll get your stereoscopic
picture. A good result is achieved with
HORIZ = 250, (tX,3Y ; EX) = i250,3OO,r5OI
ar.d <DX.DY.DZ) = (0.0.fi). Typ?.
N=W

MODE 1 : VDU 23 1 ; 0:0:C;G;
GCOL 0.1 35 : CLG
'EXEC PICCY

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161 YOUR COWPU~ER. APRIL 1984

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i i r f.

-_ — \-.:;t::'-. ', - "S»,Xa.iy -MfTftr ^ l".».l.:ll flk — ; M_ —

ZAGORSK

Ir YOU READ last month's article aid filtered
thr simple program, von wi'l now have spen:
nearly a month traipsing around the crypts of
7.agorsk Monastery looking tor that elusive
ikon. I 7>ro-niTO thot n get-, more inifrestinj;
from now en ii

Oi:r sample- adventure ts based on a ^rid six
squares by six, giving a lotal ?6 possible
location*, numbered to 3ft - not zero to 35
as shown in last month** feature.) or reasons
I't! explain later. Each square has tie name of
the location found at fiat position, with a
national one-way or two-way arrow or no
arrow at all linking it with any ac joining
b:>x(c:>) io indicate possible entrances and
exits.

The sample location descriptions and
movement data giver last month :s reflected
in lines 7010 to 841* of the lull listing The
englt-eyed will notice ih:i I have allured

slightly legal moves into and out cf some
locations to make it a little Easier for the
novice to move around the jrid.

Yen may now enter the complete listing
(which shruld n:okc sense to uny micro's
dialect of Basic) from start to finish aid start
playing. Bui if you wanl to understand the
mechanics of the program, you may prefer to
tackle the listing in I. tilt chunks or modules,
which I'll describe arid explain how to ter-t or.
you go along.

Begin by entering line* ! 170, 1 130, 141X1 to
1450 inclusive and 70 10 to 8415 inclusive. As
a short cut, vou cm spa'e yourself som;
typing W using Juki :okcn descriptions — for
example, Tsars' Tomb, St Fetr e instead of

those I've suggested. Cn the other hand, you
may like :o start improving on my efforts by
expanding or the descriptions to the limits of
vour imagination.

When you have- finished er.tering all those
lines, chtck your descriptions for awkwtrd
line breaks, spelling mistakes and general
srreen presentation. Io do so, simply type
Run X, where X is the description's line
number; and hit Return. Give special care to
encter.ng lines 1400 and 1450. Each of them
offers a signpost to one horizontal raw of six
locations. Here .s how they work:

Your current position or CP :s set at
loenicn 23 — line 1 1 7C — at the start of every
new game. That value is then tested by lines
1 400 io 1420 in this way. As it is not any of
rhe locations nnmhcrtd 1 to 13, you drop
through hies 14D0 to 142C an.4 come to rest at

14 50; GP is less than 2> but not less than l u .
Most micros 1 B^sic need a minimum value of
1 for On Goto commands, which is why I
dropped the zero when renumbering the
grid.

The program branches

In this particular rase, the On Goto routine
expects a value from 1 to 6, so 18 isdecucted
from CP to provide a number in that range.
Line 14 30 endt its work by counting five
places along the queue of description line
numbers to arrive at 8170 — and it is to that
line number which rhc program now
branches.

You can check '.hai all 36 locations arc
properly signalled in thai way by charging CP

to values from 1 to 36 in turn. Do net worry
about fie error message you wil get whci
Running a test on location 33.

Now we can fill some of hose 36 locations
vith objects — a few of which you will need ta
overcome challenges and find 'he ikon. Line
10 If reserves space for tliree arrays each
containing 12 elemcrls — we want to site 12
objects. The numeric array ?h% will hold the
numbers of the squares where the ihjrrts wi I
always be found when a new game begins —
cieir (F)rimary (LJocations. The first string
array, SbH stores tr.e obiects' short names.
The second string Errav, LN$, holds -heir

lung names.

On tre frst pass through the loop in 1022
and 1024, X fills those three arrays with the
three data items in line IJiLl in lurn. The loop
repeats the process .1 times. After entering
l.nes 1022 to 1 M0, tr»?r the prtw-cdure by-
typing in cirect mod?:
PRINT PL%(1I:PRINT SNS'D^RIMT UM4M!
Thi* should generate th; screen display:

2

ROSARY

A BROKEN ROSARY IS HERE
You can rvn through the remaining 11
values dI X to check that each three-piece
suite of arrays is properly stuffed. We can now
say goodbye to the first section by ade'ing line
1 150, which awards 3 tosen value r»f 1 to each
of the five variables representing haztrds you
will encounter in the game. A value of I
indicates they are active chdlenges; a value of
neutralises.
Lines 1C20 to 1640 provide the means of

134 YOUR COMPUTER, APRIL 1984

generating a new line of screen tex: whenever
you enter a location that bold) an object. It

scam each of ihe I 2 grid positions stored in

the array PL% for a mat-h with your curreni
position.

Thus ii" your C? is 2 — the Chapel of the
Tsan — on the very first pass through the
loop, PL ?;- will equal 2. This condition
triggers screen display of the matching LN$0.
In srort, it will now read:
YOU ENTER THE CHAPEL OF THE TSARS.
A BROKEN ROSARY S HERE.

Apart from those 12 objects, his adventure
also presents f.ve challenge* — one of them,
the Hood water, is found .n wo adjoining
locations. These a-e tic poisoned water ai the
drinking, fountain, a Nazi ir. the mantle hall,
the rnin lock protecting the :k.on iti the sidled
charr.be i, the flood water, and darkness in a
gloomy :hamher. I'o conquer each challenge,
you will need ic be carrying a particular
object when you encounter it.

We have already given e;.ch challenge
variable's value of I in line 1016. Thai being
so, l.nes lt»80 to 1 73(1 check your current
local on and the status cl any challenge thai
exists there. Remember that challenges
remain n the same location throughout the
game — at least until you conquer t.nem —
whereas any object can be taken from location
to location — and left at one different from
that at which it wis found.

If i challenge does exist, control passim: to
line 8443 tc 8480 depending or the peril we
will deal with that module later. If no
challenge exists, you am move r o another
lccal:on, and lines 1760 to 1310 calculate anc
display your options. Lino 1840 adds some
screen space — CHR$(1 5) is a carnage return
— before 1850 imites your response.

Ihe nam input routine starts here. Vol
must use the letter N, S, E or W and Return
tr move If yon try this ploy will", ar. active
challenge present, lines 2010 to 2060 speed
you off :o the wrist-slapping rcuti.ie in lines

2250 o 2270. Otherw.se, line 21 10 gives :he
go-ahead and one of the four possibil.tes in
2 1 50 to 218U will act on your choice,
calculating yuur{N)cw(Piosiior and loop.ng
hark rn 120f. to update your revised C' } .

But say you do not enter X, S, E or W? The
instruction I will cill yoiu inven.ory, to show
what objects if any you are currently carrying.
The H is for help, ujing it may give you a
Hi r Prrvs Q if you Ret thoroughly t-d up und
want to cuit the game

When you reach a challenge 'ocaion, you
can only survive, escape, find the ikon or
whatever by having with you the right object
anl using the cnrivri ctinmaml I mes 2400
to 2455 specify what those commands must
be

Qualifier controls use

The CT qualifier in each line controls th;_-ir
use in the right location but in challenge and
any tvher locations, you may want to try
commands ol your own. Centre! to an
adventure is the pUyei's freedom to acquire,

and perhaps later jc:tison, the object; he firds

along the way. The commands allowing this
usually lake the form ol a two-word sentence
comprising one verb and one noun. For
example:

TAKE R3PE

GET CANDLES

CROP ROSARY

LEAVE SCROLL

Lines 2460 to 2840 walk through each such

rnmmmrl, srarrhini; for the space which

separates the two. If one cannot be found —
suggesting that one word, not two, has been
entered — control passes to line 24W. Other-
wise, lines 25 W to 2570 get to work on

splitting the two-word command into a verb
string ind no.in string, naming the word to
the left of the space V'RS and that to the right
NOS.

Lines 2600 to 2630 then check VFS for
verbs recognised. You can have any number
you like up to your micro's maximum lire
length, and even then vol can always spill
ovei in o additional lines. For example, vou
could add STEAL, GRAB or PICK; DUMP.
ABANDON or LOSE: anJ SLAY,
CONQUER or SHOOT as additions to lines
2600, 2610 and 2620 respectively. Line 2650
takes care of any verb outside the VE$

dictionary.

When you Take or Get anv object or
dispose of it — you 11 want the Inventory to
retket that fact. The routine contained within
lines 2670 to 2720 joes that for vox Like-
wise, any call for help will pass control to
lines 275C to 2800, to display any clue
available in respect of your current location,

I he Get and Drop functions are probably
the most important in any adventure program
and although you are welcome to adopt
i nqaestioningly the routines in lines 2810 to
:890 and 5020 to 3070 respective y, vou will
lind that they repay a Ihtle study.

Line 28i0 sets up a {G>et loop which will
cheek out the 12 possible objects; !i-ie 38-10

actually makes the comparison between the
object(s) found at your current position and
the nhject you want to take. If there is a match
then that location is given a negative value
(-1) only in respect of ihe object you now
carry. It is safe to use - I because it is a
distinctive value — often used, for example, to
Signal the end cf a Data queue — which
(continued on next page)

t

tl ln ( .

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i

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I

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17.

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Room

Wall
ai

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Footle)

1

t

20.

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21.

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fturr

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27

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30

on

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+-*-e

- [ r-l

YOUR COMPUTER. AP*»L 1 984 1 6b

Variables.

PL

Primary location.

S

South.

SN*

Short rame s:ring.

E

East.

LWS

Long name sfrinr;

W

West.

PW

Poisoned water.

1$

Instructions input string.

. NZ

Nazi.

1

Inventor/.

CL

Coin lock.

H

Halp.

FW

Flood water.

Q

Quit.

DK

Daricness.

SP

Space between noun anc verb.

CP

Current position.

vc$

Verb string.

N

North.

N0$

Noun string

(continued from previous page)
cannot be confused with WW Other variable.

If the location is one where a - 1 flag
already exists in respcrrt cf the object you wish
to take, then it means you carry it already, and
tine 2860 aimmmcct the faci. Or if you try to
Get an obect that is not at that location
anyway, lir.e 2870 cbes its bits. Otherwise,
2890 will confirm your selection. Enter I and
Return now ind you will see that jour

inventory has been appropriately updated.

Lines 3020 to 3075 perform the same
function in reverse in response to Drop or
J. cave, tesling in line 3050 for a value other
than - 1.

You ^ill remember that your success in

overcoming any and all ftf the fivs special

challenge depends on being in possession of
the right orrects at the right locations and
using them prcperly. Lines SC10 to 5200
monitor the relevance cf the objects you carry
to the location you have reached.

Ifycu do well, then the matching status flag
— PW" I, NZ= 1 and so on — ii neutralised
with a value of and you r.re allowec. to meve
on. Neutralising the challenge also meats thai
yuu aiu uiluvted lu itiuve un. Neulia.isiuj; die
chsllenge alio means that ycu will noi
cnimmrcr it again if you return to that same
location later. If you fail, you will either find
yourself trapped or despatched to the play
again routine in lines 900j to 9060.

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PRlliT'lKUU ••'..> LUL 11)1 C- TC.-

'i.p:/r ;»

;r ii- •■• TiC" ISSO

EHT

r.-w.

1 66 YOUR C0MPJTER. APRIL 1 984

MEGAHAWK

ZYLOGON

Fly the sensational MEGAHAWK through the
Abyss of Time as fearful bats and ice age
predators seek your destruction. Be amazed
as the 4th dimension unfolds itself with
awesome reality. Stretch your skill to the
limit as you leave the time corridor into a

new universe

DEALER ENQUIRIES WELCOME

Seek out and destroy the Android Space
Platform that threatens Mankind. Break down
the defense of the ZYLOGONS whose huge
fortresses guard wove after wave of
relentless attackers. Fast and furious
Full colour Isometiic Projection
Machine Code: Val Franco

£6-95 Inc. postage
*> uir i j"*j>v««r» eacri

Post Ihis coupon to :

BIGG

Birchall Moss Hall, Hatherton, Nantwich, Cheshire,
tel.0270 811948 telex. 367311 CW5 7PJ

Please Rush me :-

□ MEGAHAWK £6-95 inc vat

D ZYLOGON £6-95 inc vat

I enclose cheque/postal order payable to BIG G"
for £

Name _ .
Address

Post Code.

Frederick
Shot ton shows
you how to be a ;
monster mining I
mercenary with/

_of an
Atari."

pom sss.ostosuo joocq

1 REM ...IY FRFCERXr. WOT TUN

5 SErt

4 REM ...» MEtCeUWM

3 lt£n , . . tfbti trKVWftM

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110 POM. ?08,;2A:Ca.Of ASCICHWTKSU-.F
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121 REM

1ZZ REM SET MJN5TLR PCSITIONS

121 ixn

125 POKE 710, SB

124 MXF 77,0

130 POKE T.I,<CiFtKE PLY,Y3!P0FE PIXH

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330 YE=ltfjnSJR 44O0:^E-0s00L0l! ASC4CHB

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410 1=1 -It IF 1 <•« THEN 4S0

411 SOL*!} 0,0,0,4

420 tPUF Ol'LOT TX^Y: X«-9!Y v -10lBETU
RM

4«7 REM C*C OVER

430 POSmn»IO,(»:' »6;*GAME (IvER'iSO
OtL-3iSOJN0 3,0,4,0

4<»0 IF tTRlUlOl-. r«H 4CP
470 SOTC 104

499 REM Ml MORE «VSN

500 L-L-J: POSITION 0,2Il - ' *6l'H0 OXYK
H's' *lPOKt ZIO.OlFtR 1=1 Ttl WOtNFYT

I
305 FOR 1-1 TO 2«0lStUWl 0, 1 , .7, liiNFX
I I

SlOCOLOt Oiim *X, ■Y:0OTO I4S
YWV HLM WIN LIOT
1004 ST-STIC«0>
101* 50UM0 0,100,12,1

1100 if sr=n am yyu tt€n wi» oipl

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1200 IF STslJ «W W<H T-CN COLOF OlP

LOT ««,YY:YY"YYt:if30£UB 330

1304 IF BT=7 <W) ««\l? TlEH COLOR OlPL

(Hating

OT XK.VYiXX-milKKllR MO

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OT 1 ».■■■: u-11 l:lAMJk" -'-'"

\mo cm DP5PLflf i»roi»«TioH

2030 POSlTtON O,70l'> tfts'SCmF-' &;. ■
":POSIT[QN <f,22l" *6rLIV3E- - L j •

701O POSITION 0.7S!'' W.-.-OXYJEN-'iOX;"

'I

20/1 50JND 0,20), 12,6
20»0 II Oiv=0 H€N WSUi 30 1 )
20» [f L<0 T1CN 4»
B030 -k STFI6IIB Hi ^t*^ *****
-0« FJH SKJOT...

3130 IF 5TFCM0K-H OR VV<2 TV€U 32C0
-.110 r/lDB flSC(CIIWH<I2!i H23:PL0I IX,
w-i,pir>T >t y».7.cmai» 3900
Till FCP t-I TO 100:90*0 O.I.o.SiMEK
I I

3113 FTH 1=1 TO IOO1NEXI l;DXORO:ruO
1 <X,YWllR.OT <X,»»-2iC0IO *W«
J»«l IF SI1UM0 *|J OR YY>I'- -M=N 730

3210 CCLOR 0SCICHIWKI7ll*C7SiP(«T <X,
YV»I;PIQT I(.YV»2!(jl)5LIF 3W0

3211 FCR 11 10 l«0i90UIJ> v,l.6. OiNCX
T I

321S res 1-1 ri iftjiHFxi r-r-. rh
I tX,YV*1 SHOT <«,v.2iC0T0 1«8

continued on opposi'e page}

—

;10!

168 YOUR COMPUfER. APRIL 1984

"v.. J

ONCE AGAIN YOU have been hired to kill off
monsters in the deep civeins of Mais.
National Martian Mining Industrsts has hired
you in trie hope of killing these monsters once
and :or all. No or.e has ever come back Irom
then. Luckily-; a new weapon thai is able lo
destroy tbeje monsters h,is just been invented.
One problem remains though — only small
amounts of oxygen cjn te carried at one time
s» \ou will hive to co.lec". the old oxygen
tanks left behind ny other adventurers.

Yrn muit hnwvtr, he qnirb far thi»y
disappear after a whi.e. From time to time, a
strawberry or cherry will appear. If you
decide o collect them you will get bonus
points. If you wait coo long though, they will

<*o bifl anri wi 1 nf nn Irmgrr pdio.e

If you are not a very experienced
programmer, you might want to skip this
section and copy tie program. Monster Miner
uses two interrupts; the fir>t one, a Vertical
Tihink Inrvrrupt, mow* I lie stayer missilt'
objects. If you wait nor.: information on that
inierrujrt, r^fet to arcicls on '.ht subject in past
issues of Your Computer or buy one of the
numerous books on sale describing this.

The nhrr interrupt plays a hackgrounrl
tune while you tre playing the game. Th:

operating system cf your compute! supports
fkp of these geneix! purpose software timers.
I used the first one. This timer counts
backwards from a non-zero %-atu; to zero.

Upon reaching zero, the operating system
does an indirect JSR through a RAM
verror.

To use th.s t.mcr, you must Poke the low
byte of the machine language subroutine of
yours in the memory location ^22b and the
high byte in memory location $227. You must
then ?oke the anoiim dfl/60tni of a second
you want you computet to wait before it
executes your subroutine in location Si IS. In
your sutroutine, you must include another
Poke with ihe ± mount ofI/6Dths of a second
or thf stihrrniTine wil nnr rtfi-aitP a 5eCOrid

time.

The gtme also redefines the character set.
That .s why it takes so long fcr che program to
start.

By the way, this program ri v qiiir-s al least
24K 10 rjn. If you have not i;oc time co copy
in the program or you are not very good al
typing, you can always send a blan.< ctsseiie,
£3 and a self addresser! envelope :o the
(blowing address: Frederick Srn>tton, 19
Weidclaan, .9$d Tervuren, Belgium.

(listing continued from opposite page)

3300 IF 3TICKW \*l Ot >.<'1? T-IEN 74<W
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l,VY:COL0R .V.L'UU.i; 1 -I ilili U ! tn

2,YV|G0SUS $900

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r iisquni 0,0,0,0

KlSrOS [-1 TO IMlNCIT UCOLDR OiPUO

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3415 FOB l«l TO lJOlWEXT J: COLOR O:PL0

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3*00 OX-OX- 10

3903 IF PEEKOJZK1=« OR FEEK<53232>=3

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3920 IF PEEKC532541-4 OR FEE>. 153251) -5
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n ioiiic;r iiPOke 3325S r oiai.2->]iAE*ijnii

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4010 if t««fla:iCKW»ct3i) nch sc^iOs
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4W20 IF *l-4«C<CHW»n»i> tn> 90107

SO:GDSUB now

4O30 IF WtsASClOWRMJI) rf--t SCsSCtl

4010 IF **-fl9CCCHWt(l6l) n» OX-3X*5

OlSC=SC«'IOOlEOSUIi (two

404S IF M-AXtCMASUSM THEN GOSJB 4

00

4050 FOR 1-0 TO I

40W IF *€SK.33ZT2*n*4 UT P6EK03232*

n-5 nitN oon» «w
4070 HEX! L

4fT( IF ^=1 THE* 0X=aX-2:RETlfm
SOOO Efk-IAHiIF Efl>-24J T»e* 107
3010 QXc]ll-tiIF CI<*0 IHEN S0(
600C IF »<ltO WO 0X>1S0 THEM 61<»
40OT IF :x<30 <WC 0X>» T1CN V^(:63TO
61 IX

6o ic if -iki.-.o .i*d om 20 then iio-i

602C IF DI<e» Oft 0X>» THEN 6iO0

60SC 0013 WW

61 IX' COUR «SC<CHW»lt6)l IF t-l TIEN

< = IM <HMI«i>I1U><1iL'1N!<'INCH0U16I IS;

run i,cic-o

Al IC IF DX<c.31 Ot U<;-J1 TICH COLOR

•PLOT I,C

612C BOTO 7000

;.:••• .'*-i',: ir rniho) m. -. riCM Rft-in

6205 COLOR A5C<CMAR14RR)»ilF «-I THEN

2l-lNT<mr>tO»18l*liCl-INTIR»IO)llt)*

jipun n,s:iiH»fl

62l« IF 0K=I21 THEHOOCO* fl8ClCH*l»(l

S)>iPLOT It f Cl

6220 6010 7000

r.Vii IXLOR A5C(CNAR«I14>)IIF IPI THEN

.*?-= NTlfNUlOiliO *liC2-lM(RN0«>Hl»l«
JiPLOT Z2,C3i0-O

6310 IF UI',-il THEN WLCR ASCI0HAF«1I3
XCFLITT T2.C2
632» SOTO 70»
7004 RETI

70<1 RE1

70C7 FJF1 HOVE ICNSTERS

7CK3 R£1

B?°8 IF ALOil UN) ALI'l W€l <L2>1 AMD
AL>1 THEN I03

ertrt if «.<*»i tkcm nwiifo-oipore plx,

XOifiOTO W?J

WW IF SIICKWM4 RMU ">>W IrttH »<>•

lfO-WlPWE PLY,\0

9010 IF SriCKiOI^O AND COOTO THEN Y>>

-Y0»V0tPOKE PLY.YO

9030 IF BTICK<0>-7 mO r.l'XI'l TMBf ■'>•

10-VOtWWE »LX,10

9K0 1FSTICXI0»II AND X0>60 THEN l".

10-woiTOKE >CX,IO

«M0 IF 8TlX(0K>i: THP» 90«?

90» IF XX>INT(I0/2Cl «ND (0^170 THEN

WlDivr.fiy.r PUX.XC

90tO IF XXINT [10/2(1 AND XO'60 THEN X

0"iO-W:PW; Ptt.XO

W'll If TtUNtt'lVAl «MJ llffao IfCN 1

ft"0*WCiPOKI PL'.YO

90«0 IF YY>[NT<'0/2O «C Y0:l70 THEN

VO-YO*VOiP«E FIY.YC

9099 IF ALI-I TB5K >! -OiVI-O.PCKE PLf-

i, m Giro 9199

9140 IF XI>10 MS XX 1 70 IHEU Xl'Xl«9i

POKE FII>1,X1

9110 IF XX<10 ADO (1)60 THEN Xl-Il-9lP

0K£ PLX1.XI

91J0 IF YY<tO AMU YK17C THEH rl»Yl*9i

POKE F\Y«l,Yt

9IW IF YY)10 AUO ¥l>60 THEH YI«»l-9lP

Uf.€ PL1*I,TI

9IJ9 [F 6L2=l IHEH l2miY2n>iPUW PLX*

2,l2lG0!0 '.."■"■'

92W IF IXV10 flHP x:>60 T»CN X2-:2-V2l

till. PLX*2,X3

9210 if IXtIO «ID X3<l?C tHEX x2rX2>v2

IPIKE PLX«:,X2

9220 IF YY<JO IWI Y7>60 THEN Y2=*2-VJl

P«E PIY12.Y7

92K' IF YYJID MO y:<UO THEM Y2»Y2*W

|P»E FLY*2,Y2

92*9 IF ALisl THEN >3=0:V>0 FWI PLX*

S.UlGCTO 1000

WOO If STI>.1U »IH MHO iJM'u IHE* 1}

=y!.i/sipwe »n.v-s r Y;

9T;0 IF STIEK(0.-I3«I0 YJ'60 TWIN Y>

K-5-VSiFOKE PLY*S, Y3

w-JJO IF eTIEKI0>7 WO X7>60 TMtH XZ-f

3-V3lPOK£ PLUJ X3

9JS0 IF ST13<10 -11 BND X3<1'0 IMEn <3

»xs*vxipcrE plx-s,x:

9340 IF 3TIW0 <H5 THEN IO0O

9SS0 IF XXJINHUi'ZO) AM) XHI70 THEN

*>»3«IS:PWE PIX«3,X3

»ljij IF ]]KlNTll3/20> AMI i :■ AC 'HFN 1

3=<3-VIlP0*E PL:*3,)3

93'0 If VY<INI ffZ/ZQ* **1> Y3ijyO THEM

Y3»Y3"»S3lPO0E F1Y«3,Y3

9SW tF YY>lMT<YS/20> AMI Y3>60 "HEN V

s^rJ-VJiPOKE PI '+3,W

lOMO «OT0 I'.w.

IWOO FOR l=r«J TO 713: SOUND 0,1,12, )3

iMTXT liSOUlD O.0,0,0iRETURN

19»99 FEU CHONGF CHSET

20)00 nn <HAR«ii7>;ow»~v(,Ni*a'*i.
>2:\i"

2r«)in CHSrr=<PFFk'(106)-E)l25itCH»I3-37
341iFDP 1-t TO •JtliPOE CMSEm.fEEKC

IKHb-1 l-.Nl-l'- I

ZOM3 IC3TOU: M4»

2OJ20 FOR 1=1 TD 16sCHPCS=CHjET» ft5C<T

NWtllll-SDIUifOH J=n 10 7i%EAD AiPO<

E >F05*J,A|NEX1 JlREXT I

JOMO FOR toW in WsfOiF OI5FT* • , 7W-

FCEKCCUO)H>I>iMCXT liPK Si,acvi:35

AlRtrjRN

ZXI49 REN DATA FOR SHAPES

20030 DAT* 24,24,99, 25:,B8,24,Ji,36,24

,24,26,63,26,24,36 36, 16,54, 19, I24.t24

,19, 0,0,0,0, 200,62.62,500, IB.G

2W60 0ATF 233,233 733, 233,255,?5S,?5S

,?55, 16, 152, 232.1J.,23S, 131, 0,0.0,112,

I4I,IJ7 1 1E2,J27,43M

710070 OUT/ 0, 10,67. 119,249,1 1U, I, u, 49,

W, 140,243, 216, 7B,5l, 0,32, 60,145,34, IB

,10,1),*

200SOOAT* 0.0, 140 140, Hi, 11. -.4,0, 14.1

■7,7,71,10?, 178,96. 16. 34. 24, 126. J19. 3*7

,94,52,24

20090 DATA H,2i,l"0,l't,iiA.n>,M.4.

40,50, 101, 106,1 1 1, 221,: IB, 44, 133, ]2», I

02,319,21^,102,126,153

24999 REM . , .FN GRAPHICS aBFMuriHE

23000 RESTORE 26000jfTJR I-1S36 fO 1*06

iREAD AsPOXE I.AilCXT iFOF I>I774 '0

17871 50KF l,OiNEXT I

23010 m-«ZM1061-16lfTtBl»tE-23S»Pt*FO

H I=FTB«a*lii'..-. TO FT»»Se*3047t=OKE I,

OlMEXr 1

25020 FOR I?FMMVGE*1023 TO Ft4WKE*l«32

-'.c-i a.ptVF i.aifcCYT :

25030 FOR l^t«ASE>i28: 1 riuu** « i :uu

■READ AiPtKE I,AitCIT '

25040 FOR l-Fti!A5E«153: TO PNBA3E<IJ44

ilCAl AlPWE I.AiHtn :

25050 FOR !-PtfiASE>179; TO Pf«A9E4|»00

■READ A! POKE l,Al!CXT '

25060 POH 704, 198: POKE 70S,20i»OKE 70

6,70l 3 «E 707,220

Soto »xn-33z<Oin.T-iT»o;riL-iT»*;r«»:t

559,S2lPlKE *23, [iPOKE l7E8,Ptl>4:P(KE

3S27',3iralCE 34/7?, f«
25075 FOR 1-0 TO 3;P0KI PUtl.BstCX- 1

26000 DAT* 161,3, 139, 244, 6,240,39,50,2
21 , 1-41. A, .-411, t.'., 141,254,6, 106, 141
26010 DATA ZSZ, 6, 112,253,6,24,159,0,10
9,233,6,2', 10V, 232.6, US, 2X4, 133
26020 DAT* 2<X, 189, 240 6,133,203,173,2
34,6,133,205, 189,218,6. 170,232,46,255
36030 DATA 6,1*4, 15, 1 61, 177, 203, 1 43. 20
1, 169,0, H5, 2(3, 1 35, 201,21*, 244, 76,17
»0*0 DAT* 6,160,0,177 203,143,205,107
,0, H5,20;,20C, 202,208 244, 174, 2S5.D
5*050 DAT* 17:, 754,6, 157,1*0,6,189,136
,6,243,40,133,203,24,130,141,253,6
26060 DAT* 10*. 7S.6, 1X3,764, 74. 173.73
2,6,199,232,6,133,206, .89,240,6. 133
i6070 DAT* 205, 109, 248. 6,170, 160,0, 177
,203, 1 45, 205, 100, 212, 200, 2<Q, 1 74 , 25S, 6
16090 DAT* 16«.,0, 15?,2S6,6,202, 49,3.76
,2,6,76, 9»,22E,0,0, 104. 169
ifrOSOOAT* 7. 162.6, 160,0. J:. 92, 228. vo
J6100 OAT* IK. 126,90, .26. 102, 1M, W5,
163, 129, 176, «, (02, 176. 163,24,102
:tuc oat.1 re;,»->.i'-,2,.o,T4. i.:.,t4,, it;,
24,102,36. 199,126, 24,5., 107
30000 RES'ORE 30001 sFTJB l»756 TD 25o*l
IBlREAD A:POKE I.AiNEXT liRETORN
?0001 DAT* 104. 169.11. .4)1. ^.2,169.1. I
41,39,2, r*,SS, 1, 119,5», 1,141,6,210
30002 DAT* 24,103,7, 141, 4, 210, 169, li*,
141,7,210. 1*1, 5,213, 23S
J0003 DAI4 55,1,171,55,1,224,63,200.3,
16V,0, 1*» a*>,l t l6%tU,14l I 24,J,f6
30004 DAT* 0,193,128,114,1:8, 162,12},!
E2, 12B, 19*. in:, 162,128. 144, 162,182,182
,193,178, .44, 128, 157, 12B, 187
.'w.-t DAI* iju,iK;.iu^.it..;.u.i4.Mi'.'
,193,193,253,217,253,217,2*3,193,245,1
\3, 217, 18?,2i:, 182,193,217.243,243
70006 DAT* 23S,217,23J,217, 243,193, 243
,193,217, IB2.19J, 245, 2W, 2:7, 253,255

v OUR COMPUTFR, APRIL ■ 984 1 09

BBC MICRO

REGISTERED REFERRAL CENTRE FOR THE BBC PROJECT

BEEBUG^ BBC MICRO

BRITAIN S LARGEST SINGLE MICRO USER GROUP

MEMBERSHIP NOW EXCEEDS 20,000

20,000 member* can't bo wrong - BEEBUC provide* the best support far the BBC Micro BEEBU3 Macinrho ■ now
64 pages including new product fiudc Bjpplement — devoted excljsively tc the BBC Mice. P-ograms — Mnts & Tips

— K'ajO' Articlfic — M#*t — Raviowc Contncntar>. P1_J£ nicmbo'O discount jcho-no with Motional ReldlciEp. PLU9

mcmbort Software Library. 10 milrinones s Vear. First issue April 1982. Recrinti of ell issues available to

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Decimber Istue: Pmy am : eaturei Killer Dice game. Galactic Invasion, a fast moving space invasion guru:, link, n

vnrv nfcotiil ti'tsr- irlllty (ni r.fr>fjrom dvv/olaprTwnt. ASTAAD. a really OHG+florv program far Computor Aided Design, the

Percussitn Mschfta, movuiy Chequor Board display. Screen Freezer, a routine "o fraeze your favount^ yanic in mid-
play anc 3 music jl renderhg of the T waive Days of Christmas to add a jaaiond flavour. Plus articles on the T minim t
Mod* Ipirt 31 end Filing *n Ertorrml Sfieokir. Pus Disc Drive Review*. Bcok Reviews, Hints and Tips.
Jan/Fob tsua; Pragreai Feituran ScmkBlita. nnf>*rfl!lnrvt nrr»rto «rvl**o srl1 * A niaavvvmblar for the SBCmiciw, ih*
Ray Box gams to :ast ^our powers of deduction, Largs Digital Displays h Mode 7. Dancing Lines, ;n irraresting, visual
rJerron*tati<n of random numbers. Musartidus on Machine Cede GrspHc*. ihe first <( en introductory series, Teleteit
Mode (Part 41 with a set of uselu procedures. Protecting your ewn programs, ard an Intioduction to forth. Plus
reviews if Double Density Disk Cent/ctlars. Qriphlce Tiblot;. nm Software. Product nnwi. Pnxi hag Hints »nrl
Tips

March I siue : Proprem features: Krary Faotboll Oiam*. ths Manhole gene, requiring quick thought anil fast reaction.
Extending ASTAAD, our popu'ar Comcutor Aidid Ceslgn Program. The Stonamaaon, Multple Disc Catalogues, a
program version of Bach's Cantata No. 147. a pogrtm for Printing Your Own -unction Key Labels, flue artless on
AOMM • Lataet Uevot>pm«nts. Tn:.tin f j Out Your Micro (Sideways ROMs I, Mecaine Code Graphic; Ipart 2), Compact
Function Kay Definitions. D lus Reviews of FORTH for the BGC mcro. Memory Expomion Board Review, Software
Revlaws. Hint* and Tips,

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JENART COMPUTER CARRYING
AND STORAGE CASES

(Suppliers lo Industry, Commerce end Schools)

ELECTRON (afcwtratwdi £10.95

The case is specifically designed also to carry the -rarsformer.
all leads, the boxed welcame tipe and has a special inside
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DRAGON Holds transformer and leads

£12.95

BBC Holds all leads £13.95

Thsse superb British made cases aie 'Manufactured from heavy
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Al pr.ces aie inclusive <UK only) send cheque* P>'0 to

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1 9 Spire Lake, Bishops IMympton,

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Tel: Bishops Nympton 693.

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01-820 3255

1 70 YOUR COMPUTER, APRIL 1 9B4

RESPONSE FRAME

Do you have a problem? Your manual is
incomprehensible or you just cannot get the
hang of that programming trick you tried —
whatever it is, Tim Hartnell will do his best to
answer your queries. Please include only one
question per letter and mark them "Response
Frame".
SIDEWAYS SCROLL

■ I own a BBC Micro, Model B.
I have noticed an effect in many
arcade games, on the Bceb and
on other machines, that I would
like to copy. That is, the
sideways scrolling of the screen.
I have read routiens in a couple
of placet that I urn totally usable
to understand. I do not want a
compIica:cd machine-code

MjllJ.ilill |p II IV [ti ilik-iu ,!l U

wonder if there is same way it
could be done in Basic.

Welter liaittari,
i.oni!o>i, WI2.

According it Ross Symons —

aurhnr of Beginner's Guide u>
Assembly La'tgitage in the B3C Micro
— fh<* iiir>fili»«i wiy nf f.PH'fij; a
s.deways scroll on the BBC is :o
include the folkwin in a prognm:
?850 - 1
You will sec now that Conrol K
moves the screen right, and Control J
tnuvea it lk.fi. You un til the suceu
to scroll right by Tabbing to the
boitcm of ths screen, and Tabbing at
the top to get it - o stroll left. Thai is,
if voj include

PRNTTAB(O.0):CHRStH>
in yaur program, the screen w.ll
scroll every time it hits that line.

Simiarlv,

PRINT TAB(0,24)

will cause it to scroll die other way.

GETTING OUT

■ I hare a Let of trouble with
Insert mode when editing
programs en the Vic-20. Is there
a way of disabling this mode?

Pan! Gcrdau,
Hoibury,

Smithatr,f>ia,i
Si.vii' v ixtii i ■ I'okc 2)6,0 in the
direc mode, anc Insert moee will be
disabled.

WHO'S FAULT

■ I have recently bought a 48K
Spectrum and have found that
the numbers produced by the In
statements used to read the
keyboard differ from those in
programs in tnuguetneu. For
example, when no key has been
pressed, the nmmber produced is
191 Instead cf 288. Is mis a
fault?

C Smith,
Salisbury,
Wiltshire,
No. THl> is not a fault. There have
been three issues of Speciruins.
Issues, one and two tscd different Ins
rn rh\<i» %n *>$\ie iKk-i* generally.

With most Basic ptognms this
docs not cause an insurrrountable
problem. You need to do two thing:*
to modify old Spectrum prcgrams to
run en your machine. The first thing
U simply to rcai the inductions for

<!«■ program, and determine which
key prtss achieves which aim — such
as pressing the F key to fire, ot
whatever. Th:n, you need re write r
short routine which will return tc
you the In values when various keys
are pressed. Next press the keys you
nerd from the original program —
such a? !•* — and substitute the figure
you git Iron, ycur routine for all
occurences of the or.gin.il figure in
the luting you ire entering, Yim
should find then that you have no
further problems.

ALTERiNATIVE MID$

I I have written two data-File
type programs for my ZX
Spectrum for home use.
Hjwevcr, my programs lack a
fast and efficient string search
routine. Could you sugest a
simple murine fnr the Sp*crrii«n
to search a long string for a short
string as in the BBC's:
100 FOR J - 1 TO LEN (LONGSi

-LEN (SHORTS) + 1
110 IF SHORTS = MI0S(LONG$,J,

LEN(SHORTS)) THFjM 200
120 NEXT J

I have tried to adapt this very
r.imple yet fast routine, bu f .
cannot fine an alternative to
MidS which the Spectrum does
nor have.

Kenneth Watson,
Gateshead
Tyre ard Wear
Tin-: nor ini you have given fir rhe
BBC commit', an unpardonable sin,
jumping out of an iocomplctc loop.
Run this on the conpu.cr for very
long, am' the KRC Micro would
crash with ar our ot memory error.
Although the ZX machines allow

you to jump out of loops with
impunity i: i» extremely bad
programming practice, as very few
otter computers ire is tolerant.

Putting lha aside, t isunfortuantc
lh.it the ln«rr$ command, which
searches through one string foi the
occurence of another, and returns a
number which is the slatting
pesition of the second string — or
zero if it is no. fcunc — is no:
iivmhibk 1 on lite Speelrunv This
would solve ycur probleTi very
quickly.

All the standard srring-handling
command; — l.ef $, Midi, Rigb $ —
can be enukted in ZX Basic. The
lb. lowing program, although no:
brilliantly efficient, should do the job

fo* vou.

10 A = LEN(LON3$):B = LEN

(SHORTS)
2CJ = 1
3C IF LONGS(J TO B- 1i = SHCRTS

THEN 60
40 IF J<A THEN J = J + 1:GOTO 30
5UHHINI "NJI -UUNLntiJIU /U
60 PRINT -'STRING FOLND,

STARTING AT ELEM;NT";J
Note how line? 2U and W do no'

create a loop which will be
prematurely exiiec.

LETTER PRINT

PJ I have a Vic-20 computer and
I h.tve made a program tc write
a letter. Could you please tell me

how I could print that lottor out

on a printer? The address is in
Print statements and the letter is
written a» inputs lc, AS, PS,
etc.

A H l.itty,
Bit/to f Auckland,
County Durham.
IT IS INrORlTNATE thai the
Commodotc computers do not allow
the simple access to printer aXorded
by many other machines. To dump a
screen, for example^ i* a quite
torturous crocess, and even listing a
program requires three Mcjis,

'lo solve your particular problem,
you nerd to include #4, Af:er ;he
word lrint and brfor: the material
vou want in Ptinl as fallows:

PRINT 4 4. "YCUR ADDRESS' or
PRINT* 4, M>

To turn the printer 00, enter Open
4,4 then press Rerurn, followed by
CM 1)4 ard igain press Return.
Then -un yojr pro&ram, mak.ng
sure vom iiulucie a rjlosc 4 at the ray
end.

MICRODRIVE COPY

B Could yoi: answer a question
that I air. sure is uppermost in
the mtndft of all Kpcctrnm
owners interested in the
Microdrive. Is it possible to copy
one's i.mvii cassette-based
commercial software onto :hc
Microdrive to enable faster
loading?

Kan Wesson.

Ga,esitatd.

iyiic MtJ Wear.

CtttYIXG ONTO the Microdrive*

presents 'he same obstadec as.

copying a romtnercial "savc-
blockec" cassette onto cassette. If
you cor. save a jrograiu onto cyclic,
you can sine it onto Microdrive If
the program his been saved sc that it
cannot be rcsaved onrn another
cassette, without the use of the one of
the "ktk breaker" programs, then
you wilt n->r he able to save it onto
Microdrive,

ACOUSTIC MODEMS

U I am interested in purchasing
a computer for 'ovcr-ihc-
tclcphonc' line ne^vorking. At
the moment, I own a Spectrum,
bui ttnt intcrcstsd in the Vic-20
or the Commodore (4, Could
you please tell me if there is a
Modem avallahlc lor either of
these — preferably an acoustic
Mcdcm? I have seen one Modem
which plugs directly into the
telephone socket. Does this
mean that the computer can be
programmed to dial a telephone
number?

Ian C.tirntck,

Inkbema,
WoteaenHn.

FIRST, :XT Ml. say thai as fir a> I have
been able to ascertain, it is il egai to
pluc Modem; directly in o the
telephone ines in the UK, which is

vhy so many acoustic Modems are
available for various machines. It is
quite feisiabte for a computer —
usinir an acoasri: Modem — todial a
ouiu.wr for you, go n plug in A4ode.il
vould, of course, be able :o do the
sime thing.

Acoustic Modems have been
prod-jced for both the machines you
a,k about, although it may out be loo
easy to get hod of tnerr.. I have
looked through the latest issues af
Cownndore Horizons and
Commodore User yrd cid not sec a
s.nglc advertisement for Modems for
either machine*

However, before you rush oul and
buy the computer of your choice,
you had better de cnuinc who or
vhat it is you will be cnmmi-
nicaring, via he teleplnone and
computer, vith. Arc yr>u .mending
to talk to friends, access Trcsxl or
whatever? 1' wnulc make sense .o
raakc yo.ir cccuion of which micrs-
cnuputer to buy foi this purpose en
the machines which your issnriaiss

- if it is them you wish 10 talk will)

- already have.

JUPITER DAWN

■ Now that jupitcr Cantab have
gone out of busiaess., does that
mean that I, and thousands of
other Jupiter Ace owners, are
£Oing to he left out in the cold? I
had not had my Ace km.; when I
heard ahout the company
folding. I think this is most
unfortunate as I was jmt at the
point of expanding my machine.
1> there anyone stilt out chcrc
who is supporting this great little
computer?

Nevifie IVrig/.t,
Lo.uIur F,17.
Thihk has il-:i:si no indicarion from
manufarturcrs supporting the
Jupiter Ace that they will withdraw
i tat support, simply because the
a):r.|iuia is no longer Rvailible. The
Pace: ITiK RAM unit ;:. one af
s;veial expansion units available for
tie Ace, and sells for £20. It can be
farther expanded, for £;4.5D, :o
bring the Ace's full memory :o
32K.

COMPUTER CAMP

In a recant issue of Yojr
Computer I tnenticned a few
computer camps in response
to a query from Malcolm Parks
of Amersham. c ol<owing the
publication of that f ett9r, I
heard frorr Cyril Tyson,
director cf Camp Aldenham,
Which is et "liuti-msidetitiiil
adventure and computer camp
tor boys and gir's from t't/e ,'o
\'J years ', near Le'.chcnore
Heath, abou! 20 mites fro'n
central London,

The computer camp <s
designed 'or children oetween
nine and 1$ ypsrs old and
consists of one session of two
hours each day. If you want '.o
know more, write to the camp
for a brochwe at Camp
Aldenham Aldenham School,
Eisiree, Herts, woe 3aj.

YCURCOWKjTfcft, ArHIL I934 1/1

*s-v

METAGALACT1C LLAMAS BATTLE AT
THE EDGE OF TIME

A fuvt ii'nJ I'^ji'it* yunio In Ux gneitpitndtKi VIC. Cnalumolrig

andtotojrfuL with good sonlca and a ui»qw> ^ame action and
desert, tms promises to bo the most exdting new3.5K VIC
gftrro since the lrtrodut*Ofl ot GRICRUNNER nesrty 2 yetr

»<?

LASER ZONE

^"fonwico Laser Zone - »n utwIyNEW lotely
IKjINAL mastepioca of VkJej ganes desijn.
Lean to control two spaceshipa at xwa Feel
the EXHLARATION a* after long Hours ot
practice, you conyof the two sr«ps jo thai they
function as 8 smooth, oocperatlve earn! Fetl
the raw POWER as yxi Itnge for the etectrc
button and BLAST your enemies into enfiancinq
crouds of SPWE JUfvxn Feet t>e humiliation as
a carelessly aimed BLAST slams into the sice ot
your las- remaining sript! 8K expansion requred
Avtjlabla tor Conwnooore 84 £7,50
and VK.-20 IB.

V ft

Jet Mutter has 6ken GrlSrunrer - the game thtl
ii^VwJ l«art«««s ttiarts in US<v arm UK - aid
created an awesome sequel
Graphically superb, it foatjres muttple screens, new
akens and attack waves, nystery bonuses, renegade
iiunitiiMjs. duiiwor itHda diagonal tracking
countdown/ panic phase and much, much rove . . ■-
Packed Into 20 mind-zapping :onej and
accompanied by incredible somes.

8K ovponoicn ro^ulrod

Avsilabe tor Commoioro 64 £7.50
and VIC-20 E6.

HOVER BOWER

A totally original arcade game fcr C64 featuring oulstardlng or
tound track created by a prafesSonal Pla"» mard. Gordon B

ATTACK of the MUTANT CAMELS

Planet earth needs you* Hostile aliens have used gencic
engineering to mutate fflmtfs frcm nxmally harmless beasts Into ■
90 fcol hi*, netitmnlun «*iWtl«4. iayv-sfinii*) <i»M\ <amee!! '
Can you .1y your tiiy. manoeuvrable fighler over the mountainous
tanoicapt to weaken and destroy the canets before they invade
tie rumarts stronghold! Youmusi witf stand witiering laser fire and
alien UFCs. Game action scotches over 10 screen lengths and
leatu*es superb serotiinj. seanns 1/2 pla/er cctions ard
unbe4eva3(e animation 1 Play this game and yuu n never be able to
visit a loo again wthc*,t gating an it^iy tigger finjerl Awesome
nvc action!
Avajimie lor
Convnodore 6* £7.50.

:*)'

oulstardlng graphics and a
iard. Gordon Bennet has
borrowed hie netghbtxii'e

"gr Mo awrmowar Mow

way throug* as
y of the 16 lawn* as
car before the

pj Killing neighbour

retrieves his mower. Set
your dog omo the
neighbeur tc help you out
ol 'njht sfiot* and don't
annoy tie gardener. Try
not to dough through the
neat flower beds or
ovnrtieet vour mower

E7.S0

>*

REVENGE OF THE
MUTANT CAMELS

Ai ln«t the long awaited sequel to Attach c
the Mnant Camete is available- You a-e #
controling a nirety toot high, neuronrum
shieWed.Tazer splttirg death carnal; leading
arfibRtmnagcinst yrnir nvil tzysvisn i
overlords. Trie game tea'ures beajtoful
smooth scrolling, graphics anc no less than
42 drlferenl attach waves, more than any
game n video history. The challenge of
play w.fl last for months a; yot barle to see
wiafs on the next wave

Jx

(I

All orders a.

50p postage and packing

"\

GRIDRLNNER

Firaily true arca^Je qialrty

on rhe uneiftanded vir.'

Shsot down the segrventKl

OF CUDS invading the god

Beware of tie pods and rappers!

Tha awesome speed sound, and

graphic? gives

you the best

blast available <cr unexpandoc VIC

Avail abe to VIC-20 C5.00

U>mmodore 64 £5.01
Atari 400/eOD £7.50

7 '"=— "

\M

Esmoso

AWESCKvIE GAMEiS SOFTVyARE

49 MOUNT PLEASANT,

TADLEY, HANTS. RG26 6BN.

TELEPHONE: TADLEY (07356) 4478

->. v u VJ "

vvy

■VV

14AMA50FT GAMES NOW IS BOOTS. -»
-baSKYS AMDTvlANY OTHER ^ETAJLERS.

software me.

Software File gives you the opportunity to have your programs,
ideas and discoveries published. We will accept contributions for
any home computer provided they are submitted to Your Computer
exclusively. Please double-check your programs and specify the
memory they require before sending them, preferably on cassette.
We pay between E6 and £36 for contributions published.

Jump Bug

Program 1.

=ER 0. INK

■1 *

•P~.

= INK
tit «i:

FL,SSH
a none

4.0 PRINT
2; RRIGHT

50 FOR 3=Sc2«U TO 3S4.8A

60 READ s POKS S.b; NEXT 2

7Z &RTFI i4.,S,22S,i 7 .31.0,25 12

D • " - - IMS >04 #C«^A # MQt wii M*9/-rta A

j.2ESr..2£5 . 3S ,13.3£/234,2ei
30 :>5Tft la, s,i?s, 229 ,17,3a

Lo . £S0 ■ r r"~ . 36 1^- • -3£ ■ 233 . 2^ —
30 DSTK :■:. .95. 84. 205, 1?, l£f : I-
.12T,~i,2C5 =4-4. i£5, J3,.I2&,64 53

-,£>).*., i£~, :;,££:, •:■*■,££" io,i£C- :•

5 , 0, "'e , ii?5. 2«4 . i£r -35 £ 72)205.2
i4. ,12-S.i 33 £ 72,2*5 j 2i4 i2?

itf£ i'STP ?5 ,121 52 . Bi 1 0,0 , 8 j
0,339 ,2, 4 0,23, 33, 64 . ?» .i3= .-■ ' . 1
25, 3 2. 34.. 71 . £05. 244. , 125 , 33 , Si 'E'

205, £44, 225,24. iej.33 r5 ■ ?2,20S .
L3,±26,33 ^5.72 2C5 . 13 186,33,35
,73 205,13 iSS

. 1 Lfl .".'"I? J3,123,72,2»S,2*4,i25,
33 , i5t ■ 7e tvi5 ,. r*i . 125 33 . 1=^. ?t ,
;»■" ci— .125. Co . 31 .30 . 20S , 13 , 226 .
33,31,80,205,13 126,33 35,33 235
,13»1ZB ,20i

12B DAT* 3 33>124 ?2,2fcS,24.4 125^
33 _3=r.7; e , i?5.2»4-.12s 33.31,30,2
C3 .13.125 .33 .35.SC ,20Bil3, 12: ,20
1

120 DRTP, 33. 35. 34. 2S5. 13, 128, 33
, 123 , 64. ,2125 , £4-4., 1SS , S3, 0/72 ,205 ,
244,125/201

1*C P-RT* DO,"9r-;04,li#O,lO,lSO,0O
. 223 .64- .2^5 . 13 ■ 126 , 3 3 . 123, 72 ,203
,24*, 125,33,192,75,205,244., 125,2

. rO PRI*"T mT 11,5. IM* 'J. — £C£T
7 FLASH 1, e^IGI-7 ;, „Sfi3l

EC- S'S INVERSE l ■ ~lh5- l;"

IcO PRIKT fiT 0.0: .
339 Sfl'JE 'j'JBP t»U3'

.OPD
LINE 1

Program 2.

i rem pnoorvrij-i a

a RE!' bu u . n.i t a

4 LE- »S=2. LE~ UV.:i«il: LET
sc=0 LET it = -l: BOR&EPi 6: fAPEP

6 ink l. cue. . poke 32425.201

r>£iKE Si + SO.iOl. POKE 3S«C,S81'

oo to sa ie

5 LE" bx=3. LE- fey =15: LET «;■
■3 LET my=V LET j=l: LET J;:=3

LET ay a 15: LET x = 19: LET H=l&.
LE^ »*-**"■ LET 0»-?"

L© PRINT AT O. SS. "MEM "; Uvej

PRINT FOR * =1 "O i& STEP 2. P

RIHT BBICHT 1. IHK O. PBPER

Ltoer Nalla, -

Be/ton.

< ;.\[ .1 >d Jump Bug and tor a 1 6K or 48K ZX
Spectrum, th.s game involves getting a bug to
the top of the screen, In jumping th-ou^h
gaps in l he platforms. On the first sheet it is
fairly easy by: or. following sheets, hoards tre
introduced, such as a cannon-ball, a missile
and i heal-seeking mutant alien. The
platforms uIki g-jt to move faster as the skill
increases. When you lose a l.fe, voj will be
informed of the cause.

Typi in program I ar.d check it twice. Then
Run tt and Save it to tape. Type New ic char
ihe computer, not USR 0, as this will clear the

machine code as well. Now type in program 2
Save this bv yp.ng

GOTO 999
and Verify it. Now Run it. Ii" ihe pragrtm
crushes, reload both programs and check the
first lor mistakes in data ar.d correct mistakes.
If none exists c.ien check al the Poke a.id
L'SR address in program 2. Correct any
mistakes.
The program shoald now run successfully.

1

V _ C A _ p ;s

r

2

- A f - fj H - G i'' -

-•

*-

- s y - E #- - H £ -

W

nrqgffr

QaPQOOIltfoOOOOoJoopOOOOodlH

IS FOR h»i TO 16 STEP 2: rCR ..
«l TC INT (RMD*Sk;*l; PRINT FfT t.
■ IWT (RND.iO.i +3; tRlGH'' Ij PfiPER
7," " . fj£XT i: »EXT I

is print r*T „-o,«, ,->rir,eR s. ujk

3, ERIGHT i; FLHiH L . "fi<5fiGiV)ftRKv

J&IUER5E ij PR

FL.RSH i;

• gW": FLASH 01 P

IMK 6; PRPtR .

2 STEP 2: FRINT (T" Ik , I!*T IftHDtSO

) tli INK i; PAPER 5; FLfl&H 1, "o"

. MEXT l

99 FOR u=l TO 5 STEP O
lata meter- .o»i,ie let u-« . let
lW=y: PRINT RT X,yj INK 5.; PRPF

R 6, ■*

1»5 IF lNKEY$o"p" RNt TOKEYtc;

"0- AND INKE¥*o "<)■• THEM LET a* =

""•. GO TO ISO

107 LET ajilHKEVt

110 IF aS =•"<»■■ TIEN IF SCREEN* C
x-i,yj=-- - incN _t I x=x-ar lei a
$=B«: LET I«* = "JJ": LET 3* = "~: FOS

k>l TO 8: 3EEP .BS,fctS: RESTORE

UAR 33395: NEXT t: LET S£=5C+23
GO TO 13©

lt3 ir c*='"M' TICK IP* 3C«iCr.» t

X-l,y>="' T'1EM G3 SUB 6P5e. CO T
o seie
iaa if i$="p" T^EH let nftK"5"

135 IF £*="O m TMCM LET m*="f"

l^W XI- bUHttrif IX,V»« «" i ntN j

O TO 5000

132 LET y =j+ :m*="t") -<K*"="r"l

138 IF t=lU THES LET «»=0*

148 IF \>30 THEN LET y=l

ia.& IF V<1 THEN LET V=J©

ISO FOR K.=0 TO SK-1: RESTORE US

R 33395' NEXT fc

ISO IF SCREEM* tXl-l,M>»" " THEN

go sue eos©: go to eaoe

io« ir •*='•■ then let «*»-p-

165 IF X«l THEN IF SCREEN* <X,W
)-"" THEN GO »UB OOBO. CO TO B01

167 IF flTTR lX,y>»169 THEN BEEP

.3,30: DCCF .»»,£©: _rT Sl=si.tl
H

170 PRIMT RT lK,lv," " .RT X,y,
INK 3J PftPCR S,»*;flT B,2j INFERS
E 1. "SCORE "; 5 C"

173 ir tt.nl THEN NfcXt (J

ISO LET OX=a%: LET Otf=au- PRINT

RT ax,as>; ink. a; paper 6; "♦•

190 XF SCREEN* UV.»l,jy)i" ' TH
£N LET 35(=aj<+2: BEEP . Oi . 50

"; RT bX .. »y

TI1CN GO 3U

19S _ET aj=il*5: IF ay >39 OR ay
(2 THEN LET S=Sf-l: IF ax»19 THE

N LCT 92 -3

200 pr:nt at ox..cy;" ";AT jx,ay
, ;nk 3; pqpER 6; • *-

SOS IF ax=x then IF ay=u OR ay +
l=y OR ay-l=y THEN G3 SUB B0SO:

OO TO DOSO

208 IF SK<2 THENvNEXT u

2^0 _ET XJ'IX: L*T JO=»y. PRINT

RT n-,ny. IHK 4; - i»": IF •yHS>3
7 THEN LET ra?(=BX+2-. _ET »tfai; IF

»i:>13 TIC l LCT *)>■<■ 3

220 ir lllX=!i THEN IF Oytaj THEN
IF *y+HS5=i THEN GO 5UB 8358. GO

TO 6330

230 ^ET »J=ny+B-S; P^ilKT SfT >. v . >j
Uj" ", RT ■>.•>), "Br : seen .wvvi;,^
0: BEEP .0B08, 15

2<-0 IF SK<3 THEN NEXT U

250 _ET CX=bX: LET cy=by; PRINT

RT b*,by, , '^^;•; _ET a = II«T (RhD*L©

> *li _ET b>*"b«TS. LCT Ly - ,» * lit ► t>
y AND a <4> - ty tbti AND l;G'i IF bX

> 19 T-IEN LET bX=3
260 PRINT HT CX,cy;"

, ■'«£" BEEP .0008,35

£03 II- t>j( =A AND by =d
B 0OS0: GO TO 8029
27© 'JE/TT j
28© SO TO 99
5000 LET iSC=£C+209: *0P t"l TD 1
ao: NEXT K: BORDER T : RftP£W 7: I
NK 3: CL5 : BEEP .1,10. BEEP .1,
20 BEEP .5.L5. PRINT RT 2.10. F
LASH l; BRIGHT 1;"UELL DO-4E ■ " : P
MUSE 50: PRINT PAPER 7; ISK S, *T
rtO &, BUT '-, • BEEP .S.S: ^MiHI
NOU ".; ' BEEP .5^4: PRINT "IT " ; :
6EEP .5,3: PRINT "GET'S " BEEP
.8,3: PRINT AT 6,11, 6RI3HT t; '
MfiRDER " : BEEP .S,lt BEE= .5..10
?.i-llt1 PftU»C SO: LCT bK=ilttl: Xr a
k ;3 THEN LET JU5

SOIS PRINT AT 9,5; BRIGHT Xi I'JK
3 PAPER 7, -HOtJ HIGH CRN YOU TP
Y?";AT D,7; INK S>; PRPER &; FL1S
rt ii" ouH koug "
F030 FOR q=Q TO 5 1.: BEEP . 5 , q : P
RIHT AT 18- (q*2) .. IS; INK q;CHR$
(150+<i)." "; tq-1) #50; " H": VE

XT q

SOfcO IF SUrl THEN POKE 32425,0

5065 IF Sl=2 THEN POKE 32450,0

507© IF SK=3 THEN POKE 32469,,

5075 IF ik>=2 THEN LET »S=ms+l:

IP »5>& intN LCI »s=&

S080 IF SK>3 THEN LET s K =3

SO90 PRUSE 50. FOR tt=0 TO 10: BE

EP .00S.5B. PRINT AT 21.,k;" "J F

LASH lj BRIGHT 1; PRPER 7; INK B

, » lo itari": NtJi K

•jIOO BEEP .05,40: BEEP .05.50: B

EEP .05.30. BEEP .05,69: IF INKE

Y*<>"£" THEN GO TO 51O0

KllO BOROER 6: PAPER S: INK 1: C

L5 : 1>U I U &

6000 LE"' li \/i5 = li *iiS-l: IF llve.i

<1 THEN GO TO S10O

tv010 PAUSE 50: PRINT RT 21,2;"Pr

ess any key -.o continue": PRUSE

Press ENTER to p tsSy
RUN

© : CL3
bieO INPUT
"J LINE J*-
7999 STOP

aOPO PAUSE 20: PRINT AT Uj ,. iVi£„

;RT 19* J i.
BRIGHT
09

BR 1

Bfil
BR I

GO TO £,003
3C510 PRINT AT iX*}«f,S,
FLASH l; BRIGHT .; »
, OT 21,a; "bansea juvff «»•«
TO 6000 _ _ , __-. , .

B02O print r- ai . a; jpi-g iP- *<

GHT l; "Shot ! ! "! GO TO 6000
8030 PRINT AT £1,2; FLASH 1,
L-l-ll X, Ss«i.«0 I » ■ : OC TO 0666
8040 PRINT AT 21 j 2; FLRSH 1;

GHT l; "lutatad! ! ": c-o ~o sees

8050 FOR h>l TO 100: NEXT k: FOR

k.S9 T3 10 STEP -2: BeEP .SOl.k
nbxt k. ro^ k-1 TC a. FOR J«,t.
TO 19 STEP a- PRINT RT j,y; 8", A
T J -2 .,«,"' ": BEEP .El,j*2: NEXT
j : NEXT %.
8850 FOR k=4 TO 1 STEP -1; PRINT

AT 19, y, BRI6HT 1, TLftSI- 1.CHR*
IHUD' PROSE 13: BEEP .5,*: N
EXT -t

8070 RETURN
9000 STOP
?>3*>«i RtsTORt s«i- fuK muan "a "

TO USR "S"*?; RERD a: POKE k ., • :

NEXT >

9991 ORTA 235, SS5, 195, 10S , 132,19
5,255,255,24,68, 126^126,36, 36.. 10
S , lOE , CD, ISO, lS6,9e,B,e , 12 , !£,<;■<?
, 126 j 125 , 60 , 16 , 16, 46 , 4B

9992 OATA 103 , :©2, 36.. 36 ., 60^ 12E , 1
26, 60, 24,60 , 102, 195, 153, 153, 155 ,
102 , 255, 23 1 , 23 1 , 139 , 129 , £3 1, 3C5 ,
■8B

'5993 OATA 24 . 60 . 122 . 126, 12&, 122 ,

&0, 24, 0. 0,185, 190,2*5, L9B, 1&S,0..

20^19,16,16,54, 1S&, 1S6.6E

^994 DATR 0,3, 126,66^66, 126, 1«6 ,

SS5

9997 RETURN

9996 SRUE "JJHP" LINE 99S9 ■ STOP

9999 GO SUB 9990: RUN

Buzz

Tony Davies,
West Briogford.
hottinohamshire.

— -^ — , — , „ ^ " —

miSMm

Tins is a FAMILY game, notable for its
cartoon-quality graphics, which show to
advantage tic cast with which the Draw anc
Paint commands of the Dragon can be used to
p-oduce such effects. It also his fasl-movinj;
(continuea on next page)

5 CLEAP5000:CLS

6 FRINTS2O0, "COPYRIGHT '';PRIN~<»264, "R. A. DAVIS ': PRINTS32
6, "1983"

10 PM0DE3, IsPCLS

11 Ml*="L402fiLBG6L^F+GG+AG+A"

12 M2*="BL8AALAG+ABO+CD-BO+C ,,

13 M3*= H 03DCO-B0+C0-BA6+A"

14 M4*="GBA+BABF+G"

1 5 M5*- " 03L2DL' 0-GGO+L2DL4CL2C "

16 M6*="T4;XM1*; )M2$5 XM3*; XM4*; XMU; XM2$j XM3*s XM5*; "

17 GGSUB2000 (listing continued on next pagej

YOUH LOMRJItH. APRIL I'JBd 173

SOFTWARE FILE

(continued iron previous page)

action and a continuous display of scoring,

with a high-score feature.

Tac screen displays a lily-pcnd with a i'rog
sitting on Mic of the liry-pads. By uiing the
right-hmd joystick and iis fire button, you can
aim the frog's tongue to hie the Duzzin^ fly
and so score points. If, however, you hit the
vasp instead, yuui scuie will revert trj zero.

There arc nine .evels uf difficulty and a
choice of game length from one to three
minutiis. The listing also gives a signature
tune — The Blue-Tail Hy — and an
introductory display, which give the final
product some polish.

Lire

11-16

FunctiDn

Make the tune.

19 Introduction.

20-310 The background.

320-4*0 The frog.

45C-560 The scoring.

S61 568 The options.

50C-637 The wasp and fly (0$ and A$l

57E-740 The action and check for hit

routine.

?nrO-;i95 The titling.

(listing continued from previous page)

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:2«C- CtJt*fr> JT »2«r>.'«05t ¥ =*»r-4> H'.ittu:

Reset control

M V/arren,

Lewes,

Sussex.

■

<aw

Thf Oric has a reset button. It works
extremely well, except that to op;ra(e it
requires the use of a screwdriver or mmc
other similar object. As a uuie yi ufessiontl
method, here Ls a routine that allov/s Ctrl Z t3
be used instead.

It works by intercepting interrupts and
diverting then to 400 hex, where a shott
nmt.nc checks tc see i" Control an J Z aie
pressed If they are, conrol passes to a ROM
rsut.ne at F400 hex — the reset routine.

10 REPEAT

20 READ D$

30C-VAL("*" + D$)

40POKE^«400-T,C

50T=T+1

60 UNTIL DO-' CND"

70 :
100 DATA48,8A,48,98 48 20.00,97.68,A8
HO DA I A3«,AA.Ba.4L:,U3,E(_,"END"
120T=0
130 REPEAT
140 READ D$
150C = VALI"tV" -t-D$l
160 POKE* 9700 + T.C
170T=T f 1
180 UNTIL D$ = ' END"
200 DATAAD.O0.O2 C9,A5,FC,O1,60
210 DATAAD.OF O3.C9,DF,FC,O1,60
22ODATAAD.1O.O3C9,BA,FC,O1,60
230 DATA4C,30,F4,"END-'
240 DOKE | 229, # 400
250 NEW

260 REM •♦•*«♦** ""CHECK & SAVE
BEFOFE RUNNING!"**"

Statistics

P Hit',

Cerahatlon Beeches,

Surrey.

nTBim**iiin

i;;3»

This STATISTICS PROGRAM is for the Dragon
32 : using approximately 1 ?K of memory with
an optional printout using the Seikasha GP-
100 A printe:. It contains six sub-programs
allowing you to display *: pie chart — lines
850-1080, the mean, variance tnd standard
deviation — lines 1090- .250; a pjreentage
break-down — lines 12o0-: 39U; a bar graph —

lines 1400-1550; a frequency polygon — lines
1560-1660 — and a his-.ognim — Hnss !67'i-
18<10.

Numbers and letters arc dispkyec on the
high-resolution screen t>y means of a Draw
statement. The position for the letters in the
Draw s:atement of the pie char: \v. achieved by
using the Circle command in the background
colour and finishing at .he mid-point of each
iegncnt so that the most recent p^inl of each
segment will be it the correct starting point

for the Drixv statement.

After each sub-program pressing the Z key
will rcurn you to the title page with the
choice of further sub-pmgrums.

1 O PRTMT"

ii

20 PRINT"

.... STATISTICS "

ii

ii

60 FOR R= 1 TO ..

SO'XH NLX 1 K

70 CLS

80 LET S-0

90 PRINT <& 200,

"IN=UT TITLE"

100 INPUT T*

110 CLS

120 PRINT @ 192

, "TOTAL NUMBER OF ENTRIES UP TO 12"

130 INPUT T

140 DIMA(T) ,B:T

,A*C10>,B#C12J ,C*<12)

130 FOR R«= 1 TO

T

160 CLS

170 PRINT" INPUT

AMOUNT FOR ENTRY NO. ";Rs INPUT A(R)

180 LINE INPUT '

'NAME OF ENTRV ';C$(R>

190 S=S+A<R)

200 NEXT R

f

c
C

174 YOUF CCMPUTER. APRIL 1984

JWN

S0FTWA1& FILE

K> ','15

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V , V#AI -i«4 « ffl
J7KI PRINT* tS,CN**<A>|

I'l'UHIll t

l't?i> rvnilp-5-,CH»f llS>i
tlM HEKT »
1 '• (• PratiTH-ZaCHU IIS>
l-HO RETURV

1=40 R6» QSsH LtTTtKS
I"-0 UFIW H>23 , l«7f

I'm., rir. <■- ■ k •

: AW»>(Ftl • b■ill*L6•

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2t'.'0 FEU t H -I'll' ■•

71-1 : .,*l. V., 1.4 ■

■I ','■ I - I. t' •»

. r I .'.^ct,! ♦ .WIS'

-•■■i I 'j-'T l>

.... .-■ *y- ii

• ' ■ .-M. u H...Cr.'i"

... -,'.'C

Trade

Liys Gw/n,

Boncath,

Dyfed.

hipp" i*i.!

iiji!:!.

. 1. ■ ,■■-.

Trade is ,\ game for one to four players. The
object af tie game is to buy and sell gooes and
to make aprofit. After the chosen number of
mms has been completed, thcplayei with the
most monsy is the winner.

When the program is run the screen will be
blank ."or a few seconds. When selecting tie
number of turns 10 is the minimum for a good
game. When contracts is displayed it means
tha: the port shown wishes to irnpou the uius

ot goods dispkyed.

\\ Ik 1: in ijiiiI y»u ut;i_y buy in ;iiil i',iiik.s u.

list infounaiion. Your ship hts thic; holds
each of .vhich can take up to 510 units of any
one type ol goods. On selling each hold i*
considered individually. If you fulfil a
contract you will make a profit^ if you sell to a
pott you will make a slight loss. Whe.i at sea
use N, E, S, W to move voir ship while
sailing.

D will display a po:ts location, G will
peiu.il pubsagc ihiuugb d canal and P will
ailow entry into port. Contracts atic prices
may chtnge.

Randomly d.triug i game at the end of the
gams I he pi ice ol the ship will be included in
Jk tsse-isujeiil.

S :-v£M RE v KJPU;K,FI£ri,V5 J l-iv.L

•■ JtFPQyL MfltHlM£RY.il4 . 4?>e .L.E.MIJ

VUL-i .i- .:-.■ C. ■__■£?. SILK, 249 «r?C"

. i?ri»-;v. c .r:* .Mi. . ias .. jO,CflL:uTTfi,-JL

'■?. ^-fflj, 14&. Ctrt-Off TfIR..355, 155 TC

• . 0,ctUcCTR ICftL , Z3* , •■}.(> , C-^NDE SPP

H.'l 'L"--'. '.-> 'si-:' . i-.'-j .

. e mti t f l- ■. •. , l '. con . Z7& , 145 . unp

C :C .OtCl.i. , i-^6, e-Sv), JftMiTICfl .RLIM
i/i^iSJ^EWiOJ AIRES ,6eE=,504.. It.

C d C'6T RC'IT , CftC 5,171, 34-5 , NSU ORUE."

Ms- , CO i r on , a?* , yjv , ohnuuu jtH , i- Bti i

T, 124. , i55,N<"nSf-l5H .COFFEE. 3S4. ;.■??

iOEi, . 35*>, ?4)S, PWJRHft, v 33E,,C*i3iV.

IS />.-3r

2© .-'ftlrn- OF JJ 6, TRACES-

£-3 UST » = i-S>3i*

:-e dim Pci2c. ii>

C"E L-2r> l-5 :.- C . iO;

46 I>I« H ISO!

45 DIH C 126)

36 rOR Xcl lu nic

SS COSLB l&E

©0 LIT P$(X)=i=ls

SS G3SLB IOS

70 L£T t$(X)-flt

7"5 COOLD IOC

89 LET M (.<) =WL A*

65 Giis-B la?

J(? LET CCXJ =C'rtL RS

(continued on page 177)

YOUBCUMPUIEK. APHIL 1S-B4 175

The dream makers

~'iAm&!xr!2&5£

MJi.i±£iA

Mf»i^K

K

•

t<fc,

I w&fef, HH^^I BBS

3S

* :

H

'■■•■" v .

HI

y*!

>"

1

*$

;w

wwwcv

cm

x

\

1

BH H96 IS

53Stt

idCKdw

CRL orings & whole new world of excitement right in toyour
living room!

Games that testyuur skills .o the ultimate - whether it's zapping
down invaders or playing a whole game of cricket.

OnlyCRL offers mirth a.widechoice of computer programs for tho
wor'.d's most popular micros.
. . catch cne today at Menztes. Boots. W. H. Srr iths.
Spectrum Group and £,1] good computer shops or send
direct to jQRL.

Never has sc much fixeiLeiiieii^btieri container! in a cassette!

CRL House, 9 Kings Yard,
Carpenters Road, LONDON E IS 2HD
Tel: 01 533 2918

MM

n

-■ MM &B3F

SOFTWARE Fill.

(continued from page 175)

10C GOTO 140

lai let «* = "■•

IIS- LET a "PEEK A

11C LET n -ri i l

iae ir «.i£.?** rutn teT A.107CC

126 IF Eo36 THEN RETURN

130 LET RS^A*+CHR* B

138 GOTC 110

14.0 SLOL,

14-0 PRIhT ST 13,2,'nOU fIRIVf PLF

Y2RS7 (1-4) '

150 INPLT I

1S5 LET X«INT I

160 IF 1(1 OR I.d. THEN SOTO ISC

1C3 FRIt.T «T 1S,3;"H0U URUV TUP
N5?'

170 INPLT

175 LET J=INT J

180 IF < _<1 THEN GOTO 173

165 PIU Uil, so;

iyo for x=i to i

19E LET '■-' i.-: . 33 i = 100

200 LET U f:<, 1) =300009

205 LET U<X,2)=INT <RNDH6)*1

:io let y t:< . 3) -h < u o: , 2> ■

216 NEXT X

526 DIM B (3, I4-3!

325 FOR X = l TO 1*3

230 LET YoINT (RND*18) +1

S3S LET E«INT (RNOllS) (1

§40 IF Y=E THEN GOrO 233

24-5 LET F = INT CRND*390) + 1B0

250 LET B f 1,X) = v

255 LET B f2,X) =E

360 LET BO,X)-F

26SBNEXT X
279 LET NO=I
275 GQ5UB 1130
289 P.aiNT

eos ran z = i to o

£90 PaiNT "TIME ELAPSED ";Z-1

295 PaiNT -TIME LETT ";U-2+l

000 FDR Y»l TO WO

305 PRINT "PRESS R KEY"

©10 I" INKIYI-" ' THEN GOTO OlO

3 IS IF g(Y,3)=6 THEN GOTO 76B

320 CLS

335 PRIST "PLAYER ", Y

330 PRINT aT 3, B; "HONEY l";wtY

335 PRINT RT 5,B;"YOU HAVE R SM
IP ■ j

3*e' IF V(Y,2»=0 THEN PRINT "RT
SEP,"

34.* I«= WIV.aj (f« THEN PflWT ■• XN

THE P3RT O fc ",P* (U(Y.2>)

350 IF V(Y,6) + UfY,7) tU fY,8) =0 T
HEN PRINT "YOL MflUE NO GOODS RBO
RRD"

356 1= V(Y,6) ty(Y,7) iU(V,B)-B T
HEN GOTO 385

360 P3 INT aT S.JJ'ON BOARD vou
HAUE: -"

355 PRINT "GC0DS" , "UNITS"

370 FOR X-* TO 9

375 IF U<Y,X)<>0 THEN PRINT S*
UCY .X)) ,V(Y,,X+3>

380 NEXT X

385 IF U(Y,2)*0 THEN GOTO 420

390 PRINT RT 19, «; "DO YOU UTRH
TO STRY IN POPT? *

395 INPUT I*

4.00 IF I* II TO l> ""Y" THEN GOTO

7 "95

...cue IF :* CI TO 11 *Y"W" THFN GOT
O 395

4.10 LET U tY, 1) ■'«! (Y, Ij -200

416 LET U(Y,2> =0

4-26 LET EaINT CaNE*103 +1

435 PRINT "YOU HALE ;E;" H(»IFS

*30 PRINT "PRESS N^L '

4.35 INPUT If

44-8 LET P£=P£EK 16396+5B6 +PEEK

16307
4-4.S U05U6 1910

45© FOR F=l TO E
4.55 LET G=PEEK fUlY,3)+PE)
4.50 POKE (U (Y,3J +PE) ,56
4.AK LPT M$=INKEY*
4.70 IF M* = "" THEN GOTO 485
4.75 POKE U(Y.3)+PE,G
480 IF Hg<>"6" THEN 3DTO 578
4.B5 CLS
4.QO f-RS'

4.9S FOR X =1 TO 20
SCO PRINT X,P»lX)
505 NEXT x
51? fLQU

515 PRINT "ENTER HO."
R^3 INPUT I
555 LET I=TNT I

S33 IF KC OR I>29 THEN GOTC 52
9

S4.5 let h=p£ek (m:d+pe.(

545 FOR X = l _ 10
553 FOKE r-(i:+PE,S3
555 POKE f (i: + PE,H

v

F

765
575 IF M*o"P" THEN GOTO 526
583 FOR X = l "O 18
585 IF U <Y,3: =MIX>

sea NExr

S65 TvEXT
573 GOTO

THEN G3T0 86

59P !■«.'.(
593 IsEXl

»0» 0OT0 765

60S LET UIV,U«'.MT,ll- ,203+ JNT

RND+300) )

«18 LET U IY ,2) =X

SIB SOTD 795

820 IF liO'C" THEN GOTO 558

625 IF J(Y;3i«HU9)-33 THEN LPT

V (Y , 3) =>r li 191

630 IF UfY.,31 =rC19J +33 THEN LET

VW,3) =N(19>

63S LET U iY,3) =U ( v , 3J - tU <Y, 3) «=t
.20) +11 + (U . V 3) -M (20 i J

e(D LET UIY.D aUlV,lJ -4-BI1

645 GOTO 7S0

650 IF N* = "N - *=NO U tY,3) »M(iSJ +
33 THEN GOTO 768

655 IF rt*="S - PND U fY ,3) =M CI9) -
33 TOCN SOTO 7ee

860 IF N* = "E' PND U tY , 3.1 «M 120)
THEN GOTD 760

66S IF M»«"W PNP U (Y .3) =H (20J +
1 THEN GOTO 760

07B LET PC=U <f ,3) - IH» = *M"I * •.ri» —

"E") -33*(M* = "N"> +33* (rt*r"S - )
67S IF DE^33 = INT (DE/-33) 1 HEN -

ET DE=I>E* (H*= E' > «H* = "U ,, J
680 IF DEJ72S THEN LET DE=D£-73

C

©8S IF OE.l THEN LET DE=DE+7S8

690 LET RD=PEEK (PE+PE."

695 LET RU=G

700 IF RD = 123 THEN GOTO 74.5

705 LET ZX=DE

710 LET DEsRJ

715 LET RD=Z)C

s&a 4.t- nm='n~~ hhu il)c = ui oh oe

=130 OR 0E=129 OR ftU=7 OR RUcl32

OR RU=3) THEN GOTO 74S

72S IF H*«"»" PND (RUe131 OR Ft'J

k130 OR aUsl29 OR 0E=7 OR DE=132

UK t>t=iff rnt1 WIU /-4»

730 IF «»»■£*• PND (RU-13J L3R W

= 132 OR RU = 12? OR DE «130 OR DE =7

OR DE=S) THEN GOTO 7*5

735 TF H*="U" PUD 'PE=133 OR DE

• 1£ UK L>C=li=ra UK HUsiJtf OH HVo/

OR RW=5) THEN GOTO 745

74a GOTD 755

74-5 NEXT F

750 GOTO 765

7BB let u:r,3>=nt.

7B0 NEXT F

765 CLS

770 PRINT "'THRT Ua5 THC LR»T OF

YOUR MODES AND YO(J ARE NOT "N P

ORT YET"

775 SOTO 1500

780 NEXT Y

785 NEXT Z

790 GOTO 1755

TM 0L3

800 PRINT "PRESS 3 l-.EY '

60S IF INKEY* = ' ■' THEN SOTO 805

810 CLS

8 IB PRINT "THX» li THE PORT OF
" .FB IVjTjtM* '

SS0 PRINT "GOOtia HUflLRBLE ",G$
(V(Y,2) >

825 PRINT "RT R C3ST OF £" / CfUC
Y,2) >

8 30 PAW" «T 4,B;"VCU CO) 1 . C- THf
2 POLLOUING"

S3S PRINT RT 6 ( 0."1 BUY GOODS";
AT 8,0,-2 SELL G0O5S",RT 10,0; "3

DISPLAY CONTENTS DF SHIP",RT 12

,©;"4- PORT IMFOnMriTICM"

840 PRINT RT 14,0; -g LIST CURRE
NT CONTRRCTS , AT 15, B. "6 REPAIRS
', RT 18,0; "7 END 1

645 LET L0SS= (100- RKO+L0) / 100
»S» PRJ^rr PT 21.0. EWTCR CHOXCB

8SS INPUT I

860 LET I=INT 1

565 CLS

e"?« IF 111 OR 1-7 r>fMJ &C1 C- BB»

675 TF 1=1 THEN GDTC 915

660 IF 1=2 THEM GDTC 121C

885 TF 1=3 THEN GDTC 107B

890 IF 1=4 THEN G3TC 117e

RCK TF T=S THFN Gr>F.l IR 1 1 fH\

9P0 TF 1=6 THEN GOTO 1692

9E5 IF 1=' THEN GOTC "S

910 GOTO 600

915 REM BUY

<3?« i FT an=tn

«1?S FOR Xi6 TO S

920 IF UIV,X))B AND sJ ; ,' , x i i.iVfl'
,2) THEN GOTO 940

955 LEI RM=rtM+ 500-V'f>, X-»oJ

940 NEX1 X

945 IF RM=0 THLN PRINT "VOU HflV

6 ^0 ROOM OfJ YOUR SHJP"

9=0 IF flM=fl THEN GOTO 32>C

965 PRINT "THERE IS ROr.J-r •-■Oft ".

^M," IINTTA"

960 PRINT "YOU HRUE fjUiy.H

965 PRINT "HOU MANY UNITS DO YO
J UISH TO BUY AT E 1 ; C f U tY , 2) > ,

• per ijNrr

f70 INPLfT I
75 >.ET I = INT I

9S0 LET LC=3NT ( \lt < t 13 *RMDj +S \
) /-Si

963 IF X<8 GR J.AM THE^ (SOTO S7

990 TF XtCIUtY 21(;=U«V,3J THF.N

GOTO 1005

995 PRINT -YOU CANNOT VFORP TM
RT MUCH"
1000 SO.'O 97^'
1005 -ET U(Y,1) tW(y,Jj -(IjC IVIY

a) )>

1010 FOR X=6 TO 6

1015 IF UtY.X+3' =500 OR (:U(Y.X>

<>0 RNO U (Y,X) «>UfY,2* > J THEN Ou

t U 1U3S

10S0 IF l> (S«0-y (Y .X+3) J THE -i HO

TO 1040

10S5 LET UtY,X+3) =U(Y,X + 3] +•!

1030 LET U(Y.X) =U (Y,2)

1035 GOTO 1060

10*0 LET I=X- (SOO-U (Y,X+3J )

1045 LET UCY,X+3) =500

1050 LET U(Y,X) =U CY,2)

1055 NEXT X

LOOS PRINT ■■LORCIhG TCC3 t",U

1065 LET U(Y , 1) =U (Y , 1) -LC

10 70 GOTO 609

1075 IF U IY,6I +'J (Y,7. +U(Y ,8) <>0

THEN GOTO 1090

AOOO PRINT " THMC RRC NO (iUUUtJ U
N BOARD"

1088 GOTO 509

1000 PRINT "CONTENTS OF YOUR SHI
p..

1090 PRINT "BOLJ GOODS ' , ' ftnOUNT

1100 FOR X=6 TO 8

1105 IF U(Y,X>=:0 THEN GOTO 113«

1110 PRINT

1115 PRINT X-5,rfl6 5. G*(U lY ,Xi J ,

V(V,Xt3l

1120 NEXT X

1125 GOTO 600

1130 CLS

1138 PRINT "LIST CF CONTRRCTS"

11+e PAINT "PORT";Tft* 1C; 'IIIPORT

";TR6 26, "AMOUNT"

1148 PRINT

1150 FOR X=l TO NO+3

115S PRINT PI (B(1,X) ) ; TAB 15j GS I

»(a,X));TnB S6;3CS,X.'

1160 NEXT X

1166 XF 1=5 THE* GOTO 800

1170 RETURN

1175 CLS

1188 nniNT "PORT QOODO

COST"
1188 PRINT "

1190 f-Oft F = l TO 18

1105 CftlNT P«(FI ;TflB l*;C»<PJ,Tn

8 26 C (F>

1200 NEXT F

1205 GOTO 500

1210 IF UiY.61 +U CY,7: +U(Y B><.>9

THEN GOTO !««!=>

1215 PR1N1 "YOL HRUE NO CaROO *FO
R »HUE

1320 GOTO 806

1223 PR1NI "HOLD OOODS" , "RMOUNT"

1230 FOa >=6 TC 8

1235 IF U(Y,:<)=0 T HEN GOTD 1253

124.0 PRINT

124.5 PRINT X-S,TAB 5, G f ( U £Y , X i > ,
U (Y . iX+3) 1

12S0 NEXT X

1SS5 PRINT ENTER HOLD NUMBER"

1ECO IMPU7 i

1265 LET 1=IN1 I

1270 IF I<1 3R 1)3 THEN GOTO 126

1-=V& Ltl I = l+S

(.siou ir j'v,u -e> tiich aoro .ac-s

12S5 PRINT "SO YOU LRNT TO 3EL-

TO R "ONTRRCT"

1390 INPUT 1$

1295 IF I»(l TO li =Y' THEN GOTO

1365
1300 PRINT "ENTER OLAN7XTY"
1305 INPUT O
1310 LET 8=IHT O
U19 IF u.0 DR 0>y(Y,I+3J THEM G

ij^a'lF Jill TO H a "Y" THEN GOTO

14 30
132S LL1 CO^IMT 1 0*C t V fY , I) ' *L3S
SI

loo© PKriNT -.ou set ■, CO
1335 LET (.' ( 1, 1) aUfY, 1) vCO
1340 LET IMY. ICi>-U|Y.It3)-0
134S IF UiT,X+3J=6 THEM LET U<V,
1 I -.0

IOC© PRXNT "_OADIiJO fCCO ■■ , ;<D»3*
1355 LET L'lY . 1) iUlY . 1> - (0*6i
1360 L-'JTU 803
1365 CLS

1370 PRINT ".^O. P0RT";TflB 18, "in
F>ORT" , "no ffe. -PIHOUNT"
1375 FOR X=l TO NO+3

1380 PRINT X,TRB 3;F*(B11,X;) ,TR
B 1S,G*(B i2,X) J . 1 RB 28,8(3. X)
1 38S NEXT X

i 3flO PRIN1 lihlf! CCNTftnCT NO,"
1395 INPUT O
1400 LET 0-IN1

li05 IF O-l OR 0>NO+3 "HEN GOTD
1295

1410 IF B l,OI l>VIY.O) OH E(C!,U/
<)U< V 1) THEN GOT3 14.20
141S GOTO 1300

1420 PRINT "THE C3WTRACT XS INUH
LID"

1435 GOTO 1SSS

1430 IF B:3,0) :0 THEN PRINT "THA
T MUCH IS NOT REOJIRED ■
1435 IF 6I3,OJ '.O THEN GOTO 1305
1440 LET V<Y, X'3J =U IY, I +3> -0

H15 LET CO-Ol-C lUIY.I! " • IS . 1 -< OS

5)

1450 LET CO=XNT CO

1455 LET CO=CO- lO+SJ

1460 IF LUY,I+3)=0 THEN LET U fY ,

Ti =<n

1465 PKIN - "RF^ER UNLOADING FEES

YOU HPUE ","£"; CO
1478 LET U (Y, 11 =U(Y,1* +CC
14 75 LET B(3,0: =B(3,0» -O
14RA TP Rin,6) t>a TNEN GOTO 800
1485 LET r=0
1490 GCSUB 1550
1495 GCTO 600

1500 IF RND>.7 THEN G05UE 1520
1505 IF RMD>.95 THEN S3t UB 15*3
1510 IF RHD>.99 THEN 053UB 1575
1515 GCTO 780

1S20 TOR X*l TO INT fRND+3+l>
1525 LET 0=XNT lRNDtie+1)
l«n« LET CfQ)=£NT ( C ( O) * I t93 + (RN
D+20) J .100' >
1535 NEXT X
1540 RETURN

1545 LET Q»INT (RND * IND+3J +1 )
1SS0 Lt'I U(l,Oi=INT (RNDf-lSltl
1555 LET 8<£,Oi=INT (RNDf 18) +1
1360 IF tlil.O) Bii.U' THEN GOTO
1SS0

1565 LET 9lS,0)=INT (RNDf900J+10

1570 RETURN

1575 IF U(Y,2)C>0 THEN RETURN
1SU0 PRINT YOJ ARE IN A 5T0RH"
1585 IF U(Y ,9) +U fY, (.0) +U :Y ,11) >1
00 THEN GDTO 154E
iiykJ KK1NI ai.'tl.bin Uf- jm ik ,W

t" .301

1S95 Xp UIY,30J iaS THEN PRINT "Y

OU COULD SINK"

1600 PRINT ' DR1RGE SUSTAINED ';

1605 LET 3HI1>INI IHMU1WOI

1610 PAUSE J00

1615 PRINT DAM

1620 LET \J (Y, 33) =U (Y,30) -DAH

1625 IF U(Y,30) J -0 THEN RETURN

lose pmur • .our »h«p hrs sunk v

OU ARE OUT OF THE GAME"

1635 LET U (S ,3) =0

1640 RETURN

164 5 PKINT "IF YOU JUMP ALL YOUR
CAROL) Y OJ WILL. OC RDLC TO K-L'L
THE STORM AND YOUR SHIP UILL N

OT BE OANAGED *

1650 PRINT "DO YOU UISH _ D TAKE

THIS OPTION""

183B incur :*

166© IF I»(l TO 1) ="N" THEN GOTO

1590
1665 IF X#(l TO Do'Y" THEN GOT
O 1655

I07*o roR r =e to 11
167S LET U (Y .F) =0
1680 NEXT F
1585 RETURN

1590 IF U(Y 30) -=100 ThEN PRINT "
vou r>o mot MEEO nEnir.S"
1595 IF LMY. 3©)=100 TI-EN GCTO 60

170C PRINT "YOU REOUIFE •;100-U'.
v,3e) : ' REPfilRS , "CO-VT OF FEPRXK
fe £••; loo

1705 PRINT "ENTER REPPIRS"
17ie INPUT L
171B LET I=INT I

lvse if i<0 or xj iioe-uiv . 29) ; t

HSU GOTO 17tO

172£ IF U(Y. 1* iIi-100 THEN PRINT

"/OU CANKOT AFFORD THE RHPP.IRS"

i;-3e if «n Diitiea them goto j

710

l/3b LET U(V,1I-V(Y,1I 100:1

174.9 LET UfY,20) =UfY,3C) + 1

174S PRINT -REPAIRS REQUIRED""., J

00-U (Y,30»

(continued on paqe \83,

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The

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save over £1,200 with the BIG ==™

The heart of the system is the Apple He Microcomputer, it's the
latest version of the famous Apple II personel computer. It
incorporates the latest in LSI technology and other state-of-the-art
advances. Its unique modular design incorporates 8 slots which
allow user expansion capabilities no other personel computer
con match. This package includes Disk Drive with Controller plus
a second Disk Drive a suite of Business Software which includes
Sales Leager, Sales Invoicing, and Purchase Ledger by Peachtree
Software International, TV Modulator, £25 Apple Software Rebate
Voucher, Certificates, Micronetf/Prestel Discount Software
Certificates and a Catalogue of Hardware and Software.

Normal recommended retail price £2668

BIG^A PRICE, Just £1449

Micro Management Head Office:
16 Princes Street, Ipswich, Suffolk. Tel: 0473 219461

-

BBC Hardware

•'■:*.

A full colour 32K ROM computer with
text and graphics modes up to 640 x
266 graphics and BO column texl
screen, extended Microsoft basic,
built in assembler 1 MHZ and tube
interface, sideways ROM, RS 423, AjD
converter.

BBC Model B £399

Electron

Son of BBC at selected

Big iPifm dealers now!

*-»

: %>! t

Manufactured by the same
company as the BBC, who have
used their experience and
knowledge to great effect to
produce anotner winning
computer. Many BBC programs are
compatible with the Electron.

Electron £199

Memotech
MTX Series

This new and very versatile computer
is aimed at the lower end of the bus-
iness market and the home computer
enthusiast. Highly expandable disk
drives which will be available early
spring. The Memotech is able to take,
on many peripherals. Separate
numeric key pad and functions key
pad enabling fast data entry input.
CPM compatible. The Memotech
comes In two different versions:
MTX500 32K of user RAM - £275
MTX512 64K of user RAM - £315

Atari 600XL

A fully expandable home computer.
Ideal for the first time user. With
cassette recorders, disk drives,
printer, joysticks and other add-on
peripherals. 2000 software titles
readily available. All peripherals for
the Atari 600XL are completely
compatible with the Atari 400 and
800 machines already on the
market.

16K £159.99
64K £249.99

Commodore 64

i

■'■•'.■.■■

Colour, sophisticated ROM/
RAM user, full business
applications, disk drives
available, sound, UHF/
composite video, proven
basic language,
exceptional value, high
resolution graphics,

many "cddons" COOQ
available. *A«

CONCHESS

X

<-'

^

■J*,JM.

This remarkable chess
game comes in 3 different
finishes. Warning ... try it
once and you're sure to
buy it.
Models available;

ESCORTER £179.99

AMBASSADOR £229.99
MONARCH £279.99

Sinclair ZX

Spectrum

16K and 48K basic, colour
and text and graphics. Vast
range of sofware,
including educational
Many add-ons now
ava table.

16K £99.95 48K £129.95

MASTER CLASS

VIDEO

Finding it hard to come to
terms with user manucls.
Master Class videos will
take you step by step and
make first tine computing
much mere enjoyable. Hre
or buy for a very low cost.

DRAGON

32K RAM, colour, extended
basic, sound 5 octaves 255
tones, vast software rang©,
typewriter keyboard,
standard cassette drive,
high resolution graphics
256x192, text 16 + 32.

DRAGON 32 £174.99
DRAGON 64 £225.00

TORCH Z80

DISK PACK 800K.

Dual disk crive complete with
Z80 second processor and
CPM to run on the BBC. Gives
BBC 64K of usuable RAM. ideal
for a small business machine
with CPM giving acoess to a
huge range of software
currently available on CPM
machines. £$39,50

PRINTERS

SEIKOSHAGF100 E215.CC

SEIKOSHA GFPfiO £77A CO

PSONMX103 £488 75

E'SON RX-80PRINTER £339 15

bPSON FX-80 PRINTER 1 6Cteps £454 25

SV11TH CORDONA D.'WHEEL £51 1 .75

TlCSTARWRnER(dOnns) 1 1265 00

TEC STARWRI1ER RIBBON £7.47

MCP40 (Colour Pinter) f 17135

JUKlcirjuiDaisywheel) £458 85

SEIKCSHA GP-7O0A

[Colour p-inlerl £468 75

COSMOS JP80 £288 85

DISK DRIVES

DISK DRIVE 1O0K SINGIF £201 2f

DISK D3IVE200K SINGLE £241.50

DISK DRIVE 40CK SINGLE £395.75

DISK DWE80CK DUAL £711.85

1 DRIVE CABLE FOR ABOVE £ 1 2 .65

2 CRIV: CABLE FOP ABOVE £17 25
TORCH Z80 DISK PACK E839.50

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061 028 D0E7

Bcllymoney

Everyrron Computers

80 ChcrioHa Street

Bo lymanev

Cc Ant rtm

N teicnu

02oS6 6211»'62oS8

Birmingham

The Micro Oortlo
1756 Pershnre Gone
Cotteridge
Btfnnlng^on
W' 45(4664

Bishops Stortford

Computus lEos! Anglla)

3 Chunh Sreel

Bis laps Slo'tfosrj

Herts

02">9S06SO?

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Moselteld Road

Brainlrse

Essex

0376 24922

Bridgend m.

Aiiromttinfi ^rvlr.es
42 Du proven Place
Bridgend
Mid Slarr.
0636 3550

Brighton

Gome-

24 Gloucester Soacl

fVlyl.lu-i

Sussex
0273 698424

Bristol

Bronso! ComoJtPf; I 'o
24 Park Road
Bristol
0272 294188

Brlxham

Compjter Systems fTorbavl

Pump Street

BrrxhClTi

Devon
08345 a565

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00!a 9orp

6Cha1er1on Rend

Bromley

Kent

U'46UtJW

Bury

Ertertoinmeni nle'su'e

flBThoOock

Bury

061 797 34«3

Cambridge

GCC Cambridge ltd

6cHigTS1rset

Scwsion

Camtridge

Cardiff MM

Sieves Cornpuer Cen rre
Costle Arende
Cordl*
0522 4190?

Chelmsford

tsse* Computer (Jenrre

2 J 6Moulsrtarn Street

Cheimsto»c

Esse*

0245 356702

Dealer Network

Chester-Le-Street

<row'edge Computer Ce"1re

tSNorhbums

Chester .eSfeet

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0335 881014

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29We;t Hill
Dcrttord Ken'
0322 93613

Derby

Pi'tf By-e Corn put en
<0Catflelie -J-.
Londrjn Root)

Du>Uv
0337 3&5280

Dover ^L

Duvtsi 'iilttriiiiiunol

Com niter Centre

1819 Tie Charlton Airrrip

H:gh Street

tWc Kon-

0304 212/n*

Evesham

Cveshorr. Micrf OeMre
Criv/r Cou"tvcri '
Bridge? Street
Evesrom Worrs
11396 49641

Hartley

To*vr ComCH.tnr Sicre
30 'ovwi Rood
Hanley.S'o*** InT-nn'
07J? 28754]

Hav«rford Wte*t

Orm purer ".en'r-"-
18 Rivers oe Marfe'
-kaverlorc West
flywirl

04H7 ? , 7f;'Jfl?3*

Heckmondwlke

ThnMnM* npr* OrriSie^

17Mail'et Street
Heck rro v dwiV e
Wbi1 Yorkshire
(mt 4ft? 337

Hem el Hempstead

^OKfr.lns'etLid
25 Motket square
nerve- neoipsreaa
Hens
0442 55044

High rVycorr Be

>^ itn Sucks C'mputei Oervre
co rtu'l '.ooste* & Peorcr'

Wi O-rid'Ct Rocd

"ign Wycombe, Ru-.ks

04?4 4J?i'<

Homchurch

( 'orio'el Compute- Systems
1 12o North Street
Hrrr~r\urr - S«e*
04024 ifVJdl

Horsham

Micro Store
' t" Wjsl S'ree -
^Vsruinn W M'ssw
0403 52297

Ochcrd B.)5in«s Jvste'DS L'd

VCfi^St-c-l

irsham. W Susse:
(13 68461

Ipswich

Brn'nvrove
74 Ccwn Sneel
Ip.wlch Suflolt

Im.wjUi 50766

Lancashire

Slackp^o Computet Stores
170 Cnurct- Street
Blcr-kpr.n

LOncoshiie
7?^ 1 '09'.

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ToT-orrr>\T< s Wodc
20 Cwime'do Roaes
Lerwlct
Shetlond hes
05*5 2'45

London

Ccmpuiers 0'
Wlgnr-re Street
a7WlgT.orcStree'
loncton
01 4Se D373

Mctmos

14.16 Cniids Ploi:«»

Eo'ls Cou«i

I ondor,

>-■< 1_ ?3 50O0'66O7

Maidenhead

ChlSWht' OC;f1pE
45NlC10isr>n< Walk

Moidennaoc

06J8 317«

Martow

Dtvi^enc^
7/i ftoi otrce
Mfi'lev.
Buckj
06?84 '5241

Newton-lo-Wtllows

v'.i'i-r "Ann. iters
4 O'os- ..line
Ni=,v!e-. IitWiI'owi
Merscvwidn
19? 524394

Norfolk ^B

Abacis

12a Pciletsgote

Norlolt

0603 614441

Petertee

General Sortherr, Comaytng
8 Whitworlri Road
Sci.ll ■Vh•^ l"U Es'"^

Pete'lee
IX.'ha.Ti
0783 850314

Preston

t^a-riol Cc-noi 'ina
67FtKj| Gcie

Pr??1o«

-one*
077? vn<w

Reading

T t-i? Of kdhrp Cnr^*'fl <"»iY*

154 Friar Stree'

Reading

Berkshire

0734 s:»3*

Rye

Toligote »H«p
toi'ootp Gnroge
New Vincr-el'^O P-7C!rt
R>e

E Si;SS?»
R\e 2;3104

Scunthorpe

Ashbv Computer Cer
'E6 A*ibv u 'g'' Sltoei

SHumbeuido
0724 87-7E6

Southend
ts'uary so»woie
241 Vtrtorc Aven

Scut* 1 end
Essex

O70J4JSOt

St. Austell

CoTipitavi

4 Mo'k^t Street

'-i\ -'K|.;.|

0716 *2°?
Stirling

Micro Slor»

3B 1 he hroede

Wna sueei
SlMtng

Ceiiro 9eof>n
07W64S71

stoneielgh

Dicrroie ^.iei »ecn I
76 The Vorjrtwry

Stoneiegh «™««J

Surrey

rji 303 »44

Stroud

The Model Shop

22 'tlgr Street

Stroud

Gtos

04J3# so?n

Surblton

Como'jtaso've -td

8Cer<lia> Porad*

St Warts HI 1

S-.rbH-'-

Sorrey

01 390 S'. 35

Swanland

5 Me<ewn>
Swyintrrsr!

N HurT>bi»r«'<1*
04*? Sf 19t '

Taunton

^inewcve Comauer service*
CcrpoKitioi Sfteel
Tfjuntoi

Devon

06J3 5Tr>2^

Tmro

Trirof/lcrelia

t«nl'1 FMdrv'Hniise
Ne-A Brtdgf Strt>e|
Iruro
Ccrnwau

Uxbridge

J.KL Compute:*
7Winr*ni =iie^

Middlesex
08«S5'81£

WelllRD

Ho*th ken' ?c-Tipi;'9r ~=rvn

52 54 F3o||a-r..»P^-r

WeMirig -HBBBjI

BedK

Keii

D1 30'?6~

Wolverhampton

Wstvorhamp'c - ' C<nr> Jto' "'o'

1710Uchii^ d >tt

Wolverhomoio - '
0912 20907

foi yout nearest Euiopeor
'ofsp^^no rt^tc^'^or HoUcoci

Belgium

Micro Managemert

Belgium

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035.389284

Holland

Micro s/lonage■T■<=^•
NederlandS

9andHi:lss'faot9B?4fJ^
Ah Alptien-aan-de r | lit
C-fJO - 72M0

CHECK WITH YOUR LOCAL DEALER FOR SPECIAL BARGAINS AND NEW PRODUCT RELEASES

(All p-oducts normaty in s*ork but Jo prevent wasted icurney phone yourlocol daaler first before calling All orice; inclusive nf vati

InMctHI

THE HOTWARE PEOPL

i

Written by Mike W acker

i*

>»

As the last.. remaining soldier of an
army Qf-^nts crushed by a group of
scorpions, your sole purpose in life is
To rescue the Queen Ant taken
hostage only moments ago. Fast
action machine code game that calls
for a winning comb nation o' sharp
wits plus extra fast reflexes.

Available on CBM 64

Address: P.O. Box 4BT, 35-37 Watdour Strum, London W1 A 4BT

Telepnone: 01-437 31 56-7

.

SOFTWARE FILE.

(continued from page 177}

17BO goto sea

X7BO PRINT "END OF GRMK"

X76B PCJR Xai TO NO

J.7SS IP IMX.3J :>0 THEN LET ycx,l

1770 IP U(X,3)«0 THEN SOTO 17S5

177B PGR P»6 TO ©

17SO IP UfX,F)«« THEN SOTO L7SB

176S let y rx,i3> »v (X, 13) +c ty o,r

J ) #U(X,F+3> #.9

i?n pi 5

iee» PRINT "RESULT BPTSR ";Jj" G

OES"

It' 10 PCR .■:«! TO NO

ISiEa PHINI

ieae print "player ";x
leae print "To-al.£"; v<x,isi

1630 PRINT

1038 NEXT X

18*0 PRINT RT lB.flj: "DO YOU UiSM

RN EXTENSION OP THISORME?"

184.5 INPUT 1*

1850 IF IM1 TO 1) o"N" THEN OCTO

iaee if x«ii iu x> < ;■ "Y" ihcn out

o lets

186® PRINT '-'MOW HOMY EXTRA 30fS?

186© INPUT vl

1S/V us

187B oo~o aes

l««a PRtMT AT 91,«;"JO YOU UANT
ANOTHER ORME-* tWN) "

iaas lc- x*»;nkey|

1890 IF I*-"Y" THEN 2L8
189BBIF If="Y" THEN RUN

1QJI(X TP Ti="H" tmkn stop

19B8 Q0T0 less

1910 REM MRP

1918 CLS

1930RPRINT

Caterpillar

Rfcharch Arusxdaio,

Leeds.

West Yorkshire.

liiiiiL

-^—

B

1

Caterpillar is based on the papular arcade
game Centipede. The caterpillar moves
horizontally but drops down a lir.e and
changes direct inn whenever it reaches the
edge of the screen or hits a mushroom. Your
task is to kill off the caterpi.lar before it
reaches the bottom of the screen and kills
you.

The mushrooms can be destroyed by
shooting them three times. Their colour
changes according to the number of hits
sustained — no hi:s — red, ane hit — green,
tvo tits — blue. However, spiders often spin

down from their webs abavc the rrushroom
patch :o drop more mushrooms. The spiders
can be shot for tonus paints, but do not get in
their way — :hey are lechtl.

A snail also joins in ihe fun, poisoning any
mushrooms in its way. Bo'.h the snail and the
poisoned mushnoms can be shot for honus
points, but if the caterpillar comes ir.to
cor.taci with a poisuncd mushroom i; will
die.

If you manage to shoot all :he segments of
the caterpillar then you move or. to the next
mushroom ?atch> which contains more
mushrooms end all the usual crecpy-crawties
and, of course, ano:hei caterpillar. You have
three bugs with which to fight off the
caterpillars.

When asked if ycu wan: instructions, type
Y or N, However, the Instruction; are more of
an introduction to the .nhabitants cf the

mushroom patch than an explanation of the
game.

The program allows t.ie use of bot.i
keyboard and joysticks. Although you are net
Hiked if yuj waui to um: Joysticks, a check is
mad:, so you :an us: either, and you can in
fact :hange in :he middle of a game. For chose
without joysticks, the Adval commands la
Frocmove anc Procfire can be omitted. A
word uf warring for chose with joysticks:
make sure that the lever is centred when using
ihe keyboard, otherwise the program will be
responding to the ;oystick as well as the
keyboard, The keyboard controls are Z to go
left, X iu gu right, and Shift lo fire,

The program itself is well-structured using
procedures and the minimum number of Goto
s:atemerus, The following is a list cf
procedures used and their main purpose,
FRCGmove : moves the bug.
PRCCfire: fires arrows and checks if they
hit anything.

PRCCcate-pilar: no/es ca.erpillar.
FRCCdown: moves :aterp liar dewn a line
FRCCpsst checks what pest needs moving
— snai or spder.

PRCCsiail: moves snail and poisons any
mushrooms it passes ever.
FRCCsoidsr: moves spider and d'ops
musMroums,

PRCCscreen: sets up screen rJisolay.
FRCCc ear: resets variables after clearinc. a
screen.

PRCCdsac: checks If last score is a
ligfacore. displays htgn-score table.
FROCinstaictlons: displays cha - acters,
instructors, and controls.
PRCCinit: se:s up variables and defines
envelopes.

PRCCciars: sets up user-defined
characters.

/

10 M0DE2iP^0Cin-. t;PRDCchars

20 REPEAT i=RCCinstruct ions

30 REPEAT i PRCCscreen

40 REPEAT i PRCCmov»! PPXJCf i re ! PR03c itiroiHar; PRCCpss
1 1 UNTIL CV. OR D7,

SO IF CX THEN PROCclear ELSE IF D7. THEN PftOCdaad

60 UNTIL Ly.-CtPROChisco'esiUtJTI- FALSE

70 END

SO DEFPROCinove

90 IF <:NKEYI-t8) OR ADK'flLU: 01 V tol/fW) AND P7.>63
AND =0INT;A7.-32,lb)«O THE^ fOVE A/., 32; PRINT bugisA^A
7.-64 i10\/E AX ,32 j PRINT bug*: ENDPROC

lOO IF CNKEY<-67') OR ^Dv'AL ( 1 > DIV £,4<2i»> AN3 fi%<\2
16 AND POINT (AT, +96, 16J-0 T^N MOVE A>.,32iPRINT duc*iA5'.
=AX+64:fOVE A'/., 32: PR INT bug*; ENDPROC ELSE ENDPROC

ltd nFFPROC-f i rm

;20 IF (INKEYi-U QR :ADVAL(0> AND 1>»1) AMD V01 F54
THEN =y.=TRUE:eX , /.=A'/.!BV*/.=32!GC0L3,l4lHayE BX7..BYV.: VDU 2
28:SOJNno,-K«.6.l! jy.-OsREPEATsjy.-JV.-t-JtGDTC 140 ELSE IF
NOT -% THEN ENDPROC

:30 JV^O: REPEAT t J%=>JV.-1 ;6C0L3, 14: MOVE BX%, BV/i VDU228
i B v, /.-BY^+32j MOVE BX'/. 1 BY7.j VDU229

:40 IF Br/.>e95 T^E^ MOVE B)i7. 1 3Y7.:VDU22BiF*/,"FA_SEiUNT
IL FX-FALBEiENDPRCC

:50 IF POINT <BX7.+32,BV/.+16)-=l THEN MOVE BXS ,BVX: VDU2
2etmuvt. HX'ifBV/i+.y.diHMiN hnstnuvt yx'/.,&v7.+32i print en*
:SOUND 0,-15,6,2iF/:-FALSE:SC-/.=SCy,+20:VDJ4:PRINT TAB<6,
2) iSG'/.iVDU5iLNTJL -V.=FALSE: ENDPROC

i.60 IT POINT (DX7.i3Z.DYV." J 6>-2 TIICN MOVE BX% ,BY7.iVnj2
28SMOVE BX'/. ,EY'/;+32iPFINT GM*:MOVE BXS, BY7.+32: PRINT B1*
iSOUND 0,-15,6,2iF/i=FALSE:SCV. = SC7.+30:VDU4iPR[NT TAB(t>,
2) )SCX>yDU5sl.NT:L -7.=F6LSE! ENDPROC

170 IF P0INT(BX7.+32,B/7.+16)=4 THEN MOVE BX''. , E<Y7.:VDJ2
28:MDVE BX7. t EY7.-325PFINT BM*:SO'JND 0.-15,6, 2i F7.=FALS=:
BCY.= SC7.->40:VrU4: PRINT TAB (A . 2) : SCY.z VDU5: UNTIL F7.=FALSE
: EMDPROC

180 IF PDINT<BX7.+32,B , i'V.+16)»K) THEM SOUND 2,2,140,1s
MOVE BXK,By'7.:VDU229jM0VE EX7. 1 E'Y7.+32» PRINT 5 pi der»:F%«F
ALSE I P7.-0: 3C/.-SC7.+200 1 VDU4i PR TNT TAB { 6 ,2 > : SC 1 ''.: VDU3 : UNT
IL F'/i-FALSE I ENDPROC

190 IF PDINT(BX7.+32,BY7.+ 165-U THEM MOVE B<7.,BY3:VDU

228iMDVE BX7.,BY7.'*-32i : 'RINT PMti SOUND ,-15, 6 ,2i FV.^ALSE
(SCV:-SC7.+ :00lVEU4lPRINT TAB(6,2) |5C>:i VDUSlUNTIL F7."FAL.
SEiENDFRDC

200 IF PDINT(BX^+32,BY7.+24)=14 THEN SOUND 1,2,150,1:
MOVE BX7.,BY7.:VCU22B:iaVE BX7., BY7.+32:PR:NT sn»i :*: P7.«FA
LSEiFVS-^ALSEiSeV^SCy.+SOOlVDU^tFrUvJT TAJ* (6,2) : SC7-: VDU3 !
UNTIL K7.-FALSEIENDPRDC

210 IF POINT (BX5+ 32, BY7>16)<>5 THEN UNTIL J7.»3iENDPR
OC ELSE MOVE BX7.,BY7.: VDU22S:K7.=0s REFEA's K7.-K7.+1 ! UNTIL
(3X7. <K7.)=BX>: A^D SY7.<K7.>=£<Y7.-i-?2)

220 SOUND l,2,100,liNIDVE SX7. 'S7.) ,£Y7. :S7.) I PRINT G*ihQ

ve sx7. (S7.: , s/y. tsy.: ■ print rm*i bva (3X)-0t8YX (sy.> •oiSX-sa

-l,PS-F^L6EiSC^'-SC%*S'>iyDU1iPft]NT T/-B<fe,2> p£C'.li VDUSt IF
S"/.=0 THEN CX.=TRIJE: UNTIL F7.=FALSE; ENDPROC ELSE UNTIL F
7.=FALSE: ENDPROC

230 DEFPRrj"rj>t(»rnil l<»r

240 MOVE SXy.(S*/.: ,SYy.>Sy.>: PRINT ;r:IF 5Y7.(i)<32 THEN
DV;=TftUE: EfJDP^OC

250 IF S7.>1 THEN FOR K7.=SX TO 2 STEP -1 : S>7. (K7.)=SX7. (
KV.-l' I.SY7. .KV.) »=Y7. :K7."1 ) : NEXT

260 8X7.:i)"S>%{: t+SD'ii IF POINT (3XV,< 1'1-32,SY7.<1)-16) =
-I THEN PRQCio^n

270 IF POIMT(SXr.(l)+32,SY7.(l J-16)=l OR PCI1NT<SX7. ( 1) +
32,577.(1) -16) -7 OR POIMT (SX7C( 1 )+32,SY7. 1 1 )-16) =4 THEN P
ROCdown

2B0 IF FOI>IT(SXr.( l)f32,SYTi( U-lSX.^11 THEN 2rO ELSE
MOVE 8X7.(57.) , S'v7. (57.) : PRINT C*: 5X7. (S*/.) =0: SY7. (87.) ^C: SX«S
7.-1 :SX>I<i:=SX7.(l>-SD7.: MOVE SX7. A ) ,SY7. < 1 ) tPRINT C*i IF B
7.-1 THEM CX-rRUEi ENDPROC ELSE EWD'ROC

290 IF P0IMT<BXy.(l)+32,SY7<i:-16>-3 THEN MOVE EXXll)
,SY7.( 1):PRINT C*: D7.=TRUE: ENDPROC

300 rOVE SX7. ill, RY7. ( : ) : PRINT C*: ENDPRDC

310 DEFPRO-down

320 EY7. 1 1 ) =SY7. ( I ) -32s SX7. ( 1 ) =SX 7. ( 1 ) -SDVI : BDX— 8D»

330 IF PDnT(SXS(l)+32,SY7.(i;-16>=l OR P01NT(SX7. (1 ) +
32,SY7.(1)-16)=2 OR POINT (SX7.< 1 :+32,SY7.( 1 )-16) -4 THEN S
XX ( 1 1 »EX7.t 1 ) +SD7. : CJOTO 330

340 ENDPROC

330 CEFPRCCpeat

360 IF P7.=0 AND RND<:00) = 1 THEN PV.= 1 : PX7.-0: P/7.-RND (6

fcontnued en rex\ page}

YOUR COMPUTER APRIL 1 984 1 83

SOFTWARE FILE.

tconunuecf from previous psge)

>*644l 92: SOUND 1 , 1 , 100,9s MOVE PX*/.,PVy.: PRINT rinai If

370 IT PV.-O AND RND<LJO>-l THEN rV.-ZsSQUHD 2,4,lT3,ll
AX!C=iRND(20)-l)*64!AV/.=?2E!l'10Ve A>5C,AY7.I PRINT spider*

390 IF P7.= 1 THEN PROCsnsi 1 : ENDPROC ELSE IF PV.=2 THEN
p=*nr.« M -irlw-:FNDPRCC ELSI EMDPROC

790 DEFPROCsnai 1

400 MOVE P>X,PYXj PRINT ana- 14

410 PX - /.=PX'/.+64: IF POI^T (PXX+32, PY7.-16> = 1 THEN MHVF P
XV., PYTS: PRINT RMfiNOVE PXy.,PYj;: PRINT PM<:G0TO 410

420 IF FClINT(PX7+32,PyV.-16:=2 THEN MOVE PXX ,FY7.: PRIN
T 3Mi:M0VE PXX,PYXl PRINT FMS:GOTQ 410

430 IF FaiNT(PX/i+-2,PYV.-16:=4 THEN mwe px:'.,fy7.:prin
T 3M4:M0VE F'X7.,RY7.r PRINT FM*:6UT0 410

440 IF F0INT«PX"/+32,PY7.-16:=li THEN K3VE PX7., PYXf P^I

nt rr*

43C IF POINT (PX*4+52,PyX-16>-i CR POINT -PXX+32 .PY7.-1
6) =5 THEN F7.*FALSEi ENDPROC

16C MOVE FX7. ,F'YV.i fTUNT nnai 1 *i ODPROC

47C DEFPROCspider

4SC MOVE AXy.,AYV,iPRINr epiderf

4<?l*. AV/.=aY7-32i IF POINT CAXX+32 , CV/.-l*> -3 OR POINT<;\X
•/.+S2,AY*-16>=2 OR P0]NT(AXy.+32,AY*/-lo)"4 OR POINT :AX>:+
32,AV/.-16)=«ll THEN 490

50C IF POINT <AX7.+2*.AY7.-48: = 14 THEM SOUND ?, 9.140, li
QC0L3,14sMDVE Br/.,BY*.I VOU22BiFy.=>F0LSEi PX"Ql 8CX««CX+200
iVDU4iPRINT TAB(6,2)}6CX»VDU5:EMDFR0C

510 IF P3INT(AX7.+ 32,AYy.-16)=-l THEN S3UND 2,0,0,OiP7.
-0: ENDPROC

520 IF POINT <AX7.+ 32,AYV.-16)=0 AND RND<3)-1 THEN MOVE
AXX,AYXl PRINT RMtiBOTG 490

530 IF HJ1M (AX%+S2,AYX-16)"3 THEN D7.= TRUEr ENDPROC

540 MOVE AXy.,AY7.iPPrNr spiderf t EN DPRO-

550 DEFP^OCscrMn

560 MOVE 0, 1023 1 PR INT C*t C*i C«: I^OVE OBB, 1C23I PRINT
C*sC*jC*tBC0L0,2iMDVE 310, I017t PRINT'CATEFPIuL AR' iGCOL
0,3iM0VE 300, 10231 PRINT 'CATERP I _LAR"

570 VDU4t PRINT TdB<0,2>; "SCORE "j SCV.I TAE < 12,2) \ < LIVE
8 "iL7.iTAB<0,3)! ,, HIGI- "| H"/.< 1 >: T^B (12,3) I "SHEET "(sheet
XtVDUO

580 FDR K7.-1 "D TS+sheef/.j NV.= <RNT) (?0> -1 >#Ais N7.= i77-R
ND:25))*32iM0VE M7.,NKi PRINT RM*:NEXT

590 MOVE A7.,32iP3INT bug*: FOR KX-i TO ISiMOVE 5X7. (K%
I ,5Y7. (KS> : PR INT CSsNEXT

SOC ENDPROC

iK DEFPROCclear

<>2C BOUND 2,3, 120, 1 s sheet 7.=shset7.+ i j FX»FALSEiC7.-FALS
fc 1 rX-FAL8ElP7,-0l RESTORE B70(FQR K7.-1 TO 12lREAD 93%<tiX
> ,3YV.<KX) :NEXTiS7.=12:SD"':»64

630 CLS:ENCPROC

64% DEFP=\acoeaa

6SC SOUND 2,4,100,liTIME-0ifiE=>EAT UNTIL TIME>250iS0U
ND 2,0,0,0

itC DJl-r^LSCiRCGTORE 07OjF0R <%-! "O 12iKEAD SXXCK^)
,SY% (K5£> : NEXT: Si= 12 r SD7.«64» L>:=Uii-li FX=F^L£EtP7.=0

o70 CLS: ENDPROC

hRO DEFP^OChi icorot

690 VDU4i IF BCXOHXtSi THEN 710 ELSE =RINT TAB(5,3i|
"A H I-SCORE" lKX»Ol REPEAT t KX-KX+Ii UNTIL 3C'/>HS(K/.> :#F:<1
3,1

700 JS-3l REPEAT MX CJX) -Hy.CV.-i ) iH* (JX) «1-* (J7.-1 ) i J7.-J
7.-1 1 UNTIL JV."KV.iHV.(K>!)»SCy.) INPUT TAB >0, 10) "Name ",Ht:K
'/.) :H*(KV;)=LEFT*':H* <KJO ,0)

710 CLBtVDU5:GC0„0,2:M0VE 320, 928i PRINT"HI-SCaR£S" I 6
COLO, 3: MOVE 31 2, 932 1 PR I NT "HI -SCORES " I0DU4 1 FOR KX-i TO
5t PRINT TAB(0,KX#4+4>;KXiS=CC2> iH'/.CK'a) sSPC<3: ; Hf (KV.) tN
EX"

•7SO PRINT TACXZ.20) ; TPESS SPACF SAF, " : REP=ftT UNTIL
ET=32: CLS: VDU5:SC7.=Oj (.'/.=" i A''.=57fa:sbeat7:=: iEMDFRDC

730 OEFPROCnstructisns

740 yriR;[;C0_O,2;MOV= 2AA,515iPRJHT"INGTRJCTIO»JO?"iG
CDLO , 3: MOVE 25S , !51 9 : PRI NT" INSTRUCT I ONS? " : REPEPT t G#«BET
*:UN'TIL S*='Y" OR B--="M" :CLSs IF G*='N" THEN ENDPROC

7S0 GC0LO,2:10VE 7-10, 9&6: PRINT 1 CATERPILLAR" tfiOQLO.Si
MDVF 300, 991 :P=(INT "CATERPILLAR": MOVE 100,903; PR IMT buo
fsMCVE 40;>,°00:PRIN-"BJ3"jMaVE 100,800: PRINT C*|C*fC*j
C^:fOVE 40O,800:PRIWT":ATERPILLAR"

7iO MOVE 100, 70O: PRINT sn.ii If : MOVE 4<>0 . 700* PRIMT"3Nfi
I_":MOVE 100,6-:<0:FRINT *pider*:MOV£ 4iXt, 600l PRINT"BPIt
E=l":MOVE 100,500 1 PR INT Rl»f jGMfi BMf ;PMf:MOVE 400,500:PP
MT'MUSHft^OMS"

770 MOVE 100,20Ct:PRIMT"PRESS SPACE BAR"iREPEAT UNTIL
3ET"32l C_SiGCDLO, 2) : MOVE 2ofc,954: PRINT'XATERPILLAR" I C

CaLOtSiMOJE 2S6,9S9iPniNT"CATC-*PILLAR": VDU4

7S0 PRIMT TAB CI ,6); "Kill oii the 1 caterpillar be-fc

: t kills yon . '

Beware the spider *• it cr

r»"

awl « rinwn" ' ""Ki«> "scroon droppiiq"' '<muBhroo«is , and th

e •DAil nhich poisons" ' ' 'ths frushroDms. "

790 PRINJT" ' 'PRESS SPACE BAR":FEPEAT UNTIL GET-32lCL
S: VDU5iGCDLC ,2: MOVE 266.954: PRINT'CATERPII I AR"i BCOLO , 3
iKDVE 256,959tPRlMT'CATERPILLAR":VDU4

SC»j PRI\)T TAB>(5,S)j "CONTROLS";7AB:2,10){ "I L

EFT"( TAB(2, 12) ; "X RIBHT" ;TAB (2, 14) ; "SHIFT

FIRE";"AB(3,20' ( "Dr Joysticks PRESS SPACE BfiR" t RE

PEAT UNTIL l:ET=32: CLS: VDU5: ENDPROC

BIO DEFPRCCmit

620 DIM 8XY. (12) ,5Y7. U2MRE5T0RE 870S-UH KS"1 TO 12lR

EAD 8XX(KX) ,SYZ(K/.) iNE)iT

B30 DIM HX<5; ,Hf <5>iF0R Ka«1 TO SlKX<K%)«:600iK«(KX)

- >B B C"i NEXT

840 A'/.«S7A: Fi»F=tLSE i sheet "/> 1 1 57," 1 2: DX.-F ALSE i BD*/ »64 1 C
'/>FALSE 1 8CX-0 1 LV.-3 1 F*/."0

R50 FNVFt nPF I , 1 ,5, -5,-5 ,50 , 25,25, 13fc,C , O. -5, 15t ,0i E
NVELOPE 2,i;53,8,4,8,3,:,l,126,0,0,~JO,12t,OiENVELOPE 3
,2,8,-1,-1 ,B,200,?OC,l26,-i,-l,-i,126,10»ENVELDPE 4,8,
10,6,-1 ,0.0,255, 109,-t .0,-1,126,126

860 ENDPROC

870 DATA 704. 664, 640.964,576, 664,51 2, 8t4, 448, B64, 384
.864, r-20,964,256,96*, 1*2 , 364 , 12B,864 .64 ,864,0, 364

8B0 l>E-.F^ROCchar«

890 VDU23,224,O,24,32,60, 110, 122,0,0,0,23,225,0,0,8,
0,16,4,24,24

<?■•>:■> P.N*-CHK* .e-«-CHP*?-CM ! **lfCHR»-22i*CHR*8*CHRel8+UHK*
3+CHR4~+CHRf225iGM*=CHRf 13-t-CHRf3-HCHP*2«-CHR*224fCHR*8+C
HR*1B+CHR*3-H;HR*7+Cl-Rf225

910 BM'f-ChF-f lO+CHPf3-CW : V*1+CHR*221+CHR*S+CHR«lQ+CHR*
3-CH^*7+CHRf225tPM*=CHRf 19+CHR*3+CHF*1 L +CHR*224+CHR*B+
CHRf 1 8»CHR£3>+CHRf 7+CHRS225

92;> VDU23.226.24.6CI. 126. ?SS ,?SFi, ?4, 0, ft ,'^, 977, 24,76 ,
6c, 165,129,195.66,66

970 tug*=r»Rfl8+CHR*3+CHR<3+CHR*226-t-CHR*B-tCHR*18+CHR
fo-l-CHR*2+CHR*227

940 VDU25,22B,0, 16,56, 16 , 16 , -.6,16,0

955 VDU23, 22°, 0,0, 24, 255,255. 24, 66, 66, 23, 230, 0,24, 10
2,0, Ci, 102,90,66

96;i C#=CHR»lB+CHR*3+CHRf5HCHR*2294CHR*B+CHRfi8+CHR*3
+-CHR»64CHRf230

97:i VDU2T, 231, 0,0,0,0,1, 127, 254, 0,23, 232, 0,56,124. 12
* . S/., , , ,

?S:> fn«:l*«CHRfia~CHR*3*CrR*°+CHR«23l+CHR<B+CHRfl8+C
HRS3*CrRf : 4+CHR*232

9P5 VDU 23,233,0, ISO, 121, 214. 2S1 , 121,84,130,23,234,0
,; 30, 0,40,0, 16 ,B4, 130

: 005 sp i der *-CHR*l 8+CHRfJ+CHRs 1 0+Cl-R*233+CHR*e*CHRf 1 8
+CHRf3-tCHR*12+CHR*234
101 ) ENDFRDC

File saver

F D Rcsc.

Stoke Bishop,
Bristol

fMdM-iZM

V\\:.KV. TUM SPIuri'W.M with ts Save Code

command, the CBM-64 lack^ the flciliiy for
sj\::iiia portion 6) memory Frora B^sic I'.iis
prognun provides such ucility. It allows you
to sjve ai*y s".r«ich ni" memorv, apjtdfying the
stau address, the ini-ih address, filc-numc,
device number, and svcondaiy address. 'I he
device number will LSUtlly be 1 Ibi tape
savini: or 8 tor disc saving,
One. 1 you have typed th; program in rur it

viid wait tr>r it to I'.ike in a miall maehine-
vod*. routine. You will then b: askeJ to
specify addresses and device number. If you
pvc ) u:i your secondary udirc«i *"OU can

reload the file usiii^ i.nad; giving a secondary
uddcess of xcrti means that you will have to
t..se the command Ltiad "",1.1. To save a file
vhe:hcf it be date or a machine-code program
simply jtitcr SYS 49152.

t TK'PlT"FTLENflf€";F*

2 F*-LEFT*<F*,8)

3 FCW1 TO LEN(F«:P3KE819*'N.*lSC:iil3*(P*,H,i:)--HEXT

4 INPI T"STfi!?T RiinR-S:S";SP
3 INPLT"F>JD RBTjRES5";iR

6 input -rev ICE mo.";d^

7 INPlJT"SeCCNI)RT ! flODR-SS';ES
$ II -49 IK

9 I»49132

10 REAP R*

20 IF P*-"-" THEN 200

IZ rL*-LEFT*<R»,l) :flR*»RI3HT*<fl*,I)

40 IF RSCfPL*><65 THEN 3-VAL<flL*>*),6' OOTO C6

!0 r-<fl8CCPLf)-35)Hi«6

€0 IF flSCtfWIXffl ^En D*D+V 1 ii.';RR*>'0'OTn 69

n t-I?^SC(flR*)-55

E0 <=oke i,j5|»i+i«ocrro i0

100 DATA fl9*08ifl2*e8,P3/F«.20,BR*FF,flS,0l,fl2,34,PO,e3*2fl/BPiFF,fl9*FF,65.FS

110 TJPTfl P9,FF,98.PC.M.W,S3.FF,A9,F3.29,P8.FF,60,-

200 POKE n^^N^PCKEII+S.ES

110 POKE H+WiUENCF*)

220 (^IW<S»/256>sP0KElI+19i«-ftiaWiWieeiI+a3 R

230 P-Hr<EP/2S6) : PDKEII+27 ) eA-(»*256 : P0KEII+29.P

184 YOUR COMPUTE!, APRL 1984

Tape back-up

SOFTWARE FILE

J Press,

Biggleswade,

Bedfordshire.

: mmm

This uauhnh-o.wi: routine res.des in the
f rin:er suffer and will allow buck-up copies la
be mode of almost ury program on both 16K
and 48K versions of the Spec:rum. The
routine is compat.ble wi:h the ZX Interface 1
and is easy to use.

Type in the program as luted and then
enter Run. The prograrr. will Poke the
machine code into place and will then save it
to upe. If you have made a typing mis.akc,
cne message Suncheck Erroi will be dis-
played, in which case you should check the

Data 3tacoiKnls for trrors.

The cloning routine is loaded by entering:
LDAD "JPCLCME " CODE
Once the code has been loaied, either:

RANDOMISE USR 22293
You will be presented with a menu of the
tiree options available to you.

The program to be backed-up mus: be
copied block by block — Spectrum programs
usually ;onsist of two or :hree data blocks : on:
of which may be hcodcrlcjs. Prcs3 1 lor i
normal blo:k — with a header — or 2 if ih;
Hock is htaderleis. Put the program to b;
copied into the cassette recorder and start it
playing. If option 1 was selected, the name of

the block will be displayed. Cncc the blocs
has been loadsd the ncrmal Stan upe and
press ary key message will be displayed, you
s.aould then put ihe b<.ck-up tape into the
recorder, start it lecording and press any key
on the Spectrum. Whcx die bloc* has beeji
saved tile menu will be redisplayed so that you
can copy another data block or press 3 to
return to Basic,

5

LET a*0

h

REETCRE 50

10

FDR i>232?6 TO 23296+238

20

RE£Q =: POKE i,c: LET a=a+n

30

NEXT i

35

PRINT ' a

to

IF ■022B83 THEN PRINT ' " BUMCHECK ERROR": STOP

45

SAVE "JPr.LDNE"CrJDE 23296,2^9

50

DATA 62,2.205, 1 ,22, ©,22.205,66, 14, 17. 104,91 , 1 ,5S,0

70

DATA 205 , 60 , 32 ,33,0,91,229, 62 , 2-V7 , 2 1 ? , 254 , 79 . 2*30

90

DATA 1 ,40,12,121 ,230,2,411,66,121 ,230,4.32,237,225,201

110

DATA f>2. 49, 205, 166, 91 .175,55-221 , 33 , V\3<» , 9 1 ,17,17,0

120

D A T A 20 5 , 2 , 8 , 5 , 239 , 9 I , I 7 , 1 9 2 , 9 . 2 05 , 3. . J 2 , 1 , 1 . , 1 7

150

DATA 240,91 ,205, 60,32, 55, 62 , 255, 237.91 . 250.91 ,221 ,42

t ;.o

n&TA I O: , 92 , 205 ,2,9, 45, 1 M , 92

3 70

DATA 22:, 33,239,91, 195, 112

IBO

DATA ? , 62 , 50 , 205 , 1 66 , 9 1 , 55 , 62

190

DATA 255,221,1;:, 101 .95, 17

200

DATA 255 , 239, 205 ,06 , 5 ,221 , 229, 225 , 237 ,91., 1 01 , 92 , 175 , 2:37 , B2 ,

34

2»o

DATA 250,71 ,62,233,205, 1,22, 173, 17, liiil .9 ,20? , JO , 1 2 .2^3, 2Ci:S

220
5
230

DATA 2 , 230, 205,212 , 21 ,62, 255,221 , 42 ,lOi , 92 . 237 ,9i , 25C ,9.1 , 19

DATA L 94, 4, 213, J ,8,0, 17,:l76,91, 193,60*52

240

DATA 22, :1 ,0,6,6,22,0,0,22,3,0, 127,74,80,39,36,52, 13, 49, 43

250

DATA 7B , 79,82 , 77 , 65 , 7f . 32 , 67 . 79, 80 ,89, 1 3 ,50, 45 , 72 . c.9 ,65, 68 ,

69, &■

2*74.69,83,63

260

DATA 32, 67, 79 , 80,69 ,15, 51 , <5 . 69, 7B

270

DATA £>8, 13,79,00,84,73, 79, 78, 63

3D graph program

Robert Driver,

Leeds.

West Yorkshire.

mi. niiiiiiiii.ii. ;i.. i.

HiREis .\ 3D-Graph proeram which will run
on a 16K or 32K BBC Micrc. It wi.l p:ot any
section of any function for Y in term; of X
and Zus ct wiic-ftauie oi sulfate; diagram with
or without ixe> — the axes option is only
offered if the chesen values for X and L
include the oristn.

i ;-■=- .......•...«••....

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VOU ■.*••' IT "C PE BQIVTED, CIS OP.V HDri-4UHC4 S C (E

■1 T5 RETURII TO T>*I( MO*J. "

«OEh3FfiOC
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t»-:i

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KvBEr PRBCA I : BORAPH

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i*,Jivb:t

BV>EM*SCC

(cortinoec' or> page ^S7J

In che rnenuj tie last function for Y, values
for X md Z etc. ate shown and can be left
unsltered simply by pressing Return, r>r
changed by typing ;n the new vdue. All the
L-xpressiors are sntered as strings and then
EVf\Led. This Is especially us;ful for
trigone metrical fonctions where the values for
X tnd Z may need to De .nterms of PI e.g.,
-2* PI.

The menu .s virtually foolproof: it will not
iccept a highest value for X lower than the
lowest vabe for X. However, make sure that
your func:ion for Y is in -ems of X and 7,
and that there is no possibility of division by
tero. There is an erTor-handling routine, but
,t :> rrther annoyir.g to corn; and see hew
your woncerful graph is coming along, only to
Hfid thjl there was snmethinjj wrnng with trip
unrtion.

The i;raph is then scaled by Procscde which
usually does its job, but for extra-special
graphs some fiddling arotnd mty be called
"rtr: YTAT.T. ■<; tht* Vieight of the origin above
:he boiton of the screen, and YBIG is the
number of graphics units per Y unit.

The graph is then plotted in mede 4 by
Procploi. This procedure rails various ath:r
procedures acrording ro wr-erhc r r , wire-frame
or surface diagram is ailed for, End whether
axes are wanted. Basically it calls Proclirte or
?ro;ax:sUne from within a loop, which .n
lurtt call Frocfill or ?ro;sqjare from within a

Iniri

If required :he graph can be dumped up :o
nine times on to a printer by Procriunp. This
was wiitten for a Seikosha GP-2S0X tut it
should run on any Seikosha or Acorn graphics
prirterwith pjrrupsa little modification. The
VDUs it tne beginning are to specify linefeed
and graphics mode, and to print lots of spaces
so that the graph is printed ir. the middle of
the paper. Then the graph is plotted sideways.
This is h*rsiiis<» a bye? cf screen memory
represents a row of eight pixels., whereas a
byte sent tD the printer is printed is a column
of eight dots.

YOJK CUMKUl fcH, APRIL 1 9B4 1 85

I HOME COMPUTER SYSTEM

More software- more hardware!

ESS3 |

fifiii

■filii

■■■■■■ i

■■■■!■

&s5j

M,

fiSs*

i m

■ ■

ASUARfUS

The best value full colour computer
on the market — at under £60.

Welcome to the wonderful
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Aquarius owners have so
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wide ranee of new products
about 10 be ntroduced for the
best velue, most
reliable home
computer in the
word.

What othc
computer
includes a Z80

micro processor? Faster than any
other machine in the Aquarius
price range, plus 49 moving
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Microsof* BAS C and the manual
that Which Micro celled 'An
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include — the data
recorder fcr perfect
informa:ion storage, a
mini-expande' for super
game playing ard a
thermal dot
mat'ix printer for

taking hard ccpies from on-screen
nformation.

Additions to the Aquarus
■ange in the next few ncnths wil
nc ude a 32K RAM pack fo-
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and a four-colour printer/plctter for
exciting graphic reproduction.
And, of course, week uy week the
Aquarius business, education anc
games softwa r e library grows
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t Look ojtloc fcr the Aquarius
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Huge range of cassettes and cartridges
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lade erquiries webome.

Available th rough msny bating retailers - Including
Harrocte-Menztes-Carrafoi,r-Asda.

1 86 YOUfl COMPUTER, APRIL 1 984

u

SOFTWARE flit

(continued from page 185)

i). I- 1

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30 DflTfl LB ,141, 20 , 3, 1 69, MB , i 41 , 2 1

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70 DflTfl 169,0- 133,211, 163, 48 ,162, 4
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99 DflTfl 247. 232, 134, 138, 160, £, 136, 181

1 00 DflTfl 6 ,133,113,2, 200 , 202 , 224 , 255

1 1 DflTfl 20S » 245 , 230 , 1 96 , 1 63 , 3£ , 1 53 > 1 1 3
120 DflTfl 2,162.- 1,246, 0,163, 5S, £13
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149 DflTfl 224,5,203,233,76,131,234

150 2*0

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152 t*T-105.:LB=CT^256~lNTCT/236) )*256 : HB*INT<T/256)

1 53 P0KE55 , LB : P0KH56 , HE

154 LB*LB+27 : IFLB>255THENLB»LB-256:HB*HB-1
160 FOR X^T TO H-i04

170 READ V*

172 IF V$="H! : r TH-N 7^+HB :PPKEX,HB : NEXT

174 IF U *="LB'' THEN Z*Z+liB:PCKEX J ..LIi:HEr<t

176 V-VRL C VI > : Z-Z^-V : POKEX, V

180 NtX" X

190 IF ZO13063+LB+HB THEN PRIh-T "ERROR IN DflTfl -

PLEASE RE--EHTER" "El-ID
2O0 PRINT "SV3< ,, ;TJ "> TO S'IHF<T"

219 PRINT M SY£K".;T+3.;"> OR RUN- STOP/RESTORE TO EMD"

220 PRINT "SVSC'^T+W;'^ TC RESUME"
230 SVSCtS

246 NEW

CBM-64 auto lire numbering.
L9 DflTfl 1SS",4S, 133,^,133,4, 133,5
20 DRTfi 1 33 ,6,1 69 . 49 , 133, 3, 1 20 , 1 69
38 DRTfl ^7,141,20,3,153.132,141,21
4y UHIH 3*tffl

30 IlflTR 96,163, 211,281, 1,208, 6,169
60 DflTfl 60, 197, 157,243, 3, 76, 49i23*l
70 DflTfl 169, 0,133, £11, 169,43. 162, 4
80 DflTfl 213,2,203,5.232.224,235,289
98 DflTfl 247,232, L34, 138. lfJB.9, 1^6. 131
100 DflTfl 2,153,119,2,200,202.224,255
1 IS PRTfi 208,245.230, 198, 163. 32, 153 . 1 13
120 JiflTfi 2 . Irq^'. 1 , J?46,?, -69. 53, 213
130 IiflTR 2,208,3. 1-E9, 43. 149,2,232
1 40 HflTR 22* , 3. 203 , 23?, 76, 49 . 234
136 2=0

166 FOR X=491S2 TO 49256

179 READ V2=2rY PCKEK,V

l&Q NEXT X

190 IF ZO1304S "HEN PRINT "ERROR IN DflT^t - PLEASE RE-ENTER* *• END

200 REM ** SVS (*9152> TO START **

210 PEM #* OS'O <204O> OR RUN - STOI-VRESTORi 10 END

220 REM ** SVS (49166? TO RESUf'E **

230 SVS (49152)

240 HEM

Auto Number

wmm

3

,i:l:;.i

CliliocS Milter,
Orlando,
Florida,
USA.

I foi'ni> GERALD Dalvs program in ihe
November, 1983 issue of Your Compute for
automatic line numb;rir.g en the Vic-20 very
useful. However, I was unhappy to find tha
the program was designed far an un expanded
Vic. If it were to be run on a Vic-20 vvic.i
memorv expansion, all of the extra RAM
•TOu.d be lost.

I have modified ,V.r Daly's program ts be
used on a Vic-20 with any amount of menory
expansion. Th: routine is stored a: the icp cf
RAM and the additional rrierrory is
preserved. The program runs exactly like Mr.
DaK's except thai the SYS comn'.ands to be
used for rie amount ot' RAM preterit arc
printed on the Kcn:i:n Also since :he start cf
Easic varies as the Vic-20 is expanded, it may
be necessary to SYS to a Iccation other :han
4096 when intenupling the routine so that
the tyatoti will not crash.

This same program will also run on the
Corrmodore 64 with minor modifications. To
enable automatic line numbering on the 64,
type SYS(49H2). It can be disabled by a
SVSi.2048) or by hi:tin§; Run-Siop/Rxaiorc
Resume with t SYS(40 166)

T« use either of these veriiot.s of Auto
Number, lead .he program, type Run, and hit
Return. To call t new .ine number, hit ths
space bcr *vhi.e hu eur:«»r is in tic fir3t
coiuttin of a line., just as you wculd in th;
original program.

Function Keys

Robert Young.

Cntcnester,

Sussex.

mmmi

The Sihc.iri.m ijoes not have a functio:i
key facility, and si» I have written a machine-
aide pnigram whicr allows any number of
keys to be programmed very easily. This
include-. aT the lepen<:s on the krys, tbe
graphic symbols and the user-defined
graphics, so that, for instance, the Print token
can be programmed separately to the i J and
Tab Ol course, you will only wish to define
keys you are unlikely tn use for th^ir normal
(continued on ne>t page)

YOLH COMPUTER, APRIL 1 984 187

{continued from previous page)
purpose.

The definition? of keys should be put .11
separate Rem statements at the very
beginning of (he program. You should follow
the line number and Rem by the symbol you
wish to program, a colcn, and then the
definition. The definition can be ar.y
combination of characters, graphics ard
legends. If you want ii to execute
automatically then end it with the lush — #
— character. .f a syntax error is found when
the lint is exenirrri, the line will be displayed
a the bottom of the screen vith a question
mark j.s normal. Note that a key whose
definition ,s just a hash, will -ict as an enter
key.

Tie rnlnn that must be put Hetweer. the key
to be definec and the defin.tion rot only
conveniently separates the two but also puts
the .computer into K mode If. hewe/er. you
wish to start the cefinition with a xtter of the
alphaher which ramot be accessed in thie
node, t is necessary to type any token cr
symbol that puts the computer in:o L mode,
such as a keyword, then to typ: the chancier
you want and finally to go back and delete
whatever jou used.

Ruher than search through the whole
program for key definitions, the program
sups looking as soon as it finds ihe first
proper program line. Tierefote all the
definitions mast be put before the tnoi:i
program. This can be quite useful f you want
a key which has been programmed to revert to
us normal purpose temporarily.

Rather than deleting the definition all von

SOFTWARE FIIS.

need to do is change its line number so that it
is, for instance, at the end of the progrim.
Then ac a later date you can t change .t back
again Lastly if a key is defined twice, it is the
definition nearest the beginning of the
program that will be taken. Note that a
programmec key will repeat if held down.

The machine aide is include! in the data
statements of the 3asic program. The ninth
fieure of each statement is, however, the sum
of the first eight and this is used by the
program to check for errors in the data. Enter
the Basic piwjjiam- save it just to be an the
safe side, and then rur. it. If an error is found
the program will display the message Error In
Line, followed by the line in which the error
occurred. Note that the Basic program
automatically alters the machine code if you
hai-e a 48K Spectrum, so thst it is located at
the top of memory — the actual data givr*n is
for ths 16K. model.

The program will then dis->lay Prepare To
3u»c and the normal message will appear at
the bottom of the. serein. You may then save
the machine code. After this it will print
Prepare To Verify. Rewind the tape to the
point where you started saving the code end
the p-og'am will verify it futomaiically. If
this is completed successfully, the Bzsic
program wil' N^w itself leaving the mjchine
code loaned a address 32348 for 16K
machines or 55129 for 48K. hi future, to load
iht m-ichine-coce, type

CLEAR 32347
for the toK. or

CLEAR 6512E
for the 4$K, followed bv

LOAD"" CODE
The program must be turned on before it
will work. I his >s done b\:

"RANDOMIZE USR 32479' (16K)
or

"RANDOMIZE USR 65250" (46K)
To turn it off tvoe:

"RANCOMIZEUSn 32436" {1CK)

ar

'■RANDOMIZE USR 65257' ! (4EK)

Here are a few examples of key cefinitions

1 REM !: PAPER 7: INK C: C.S: BORDER 7

2 REM .; PRIST 65536 - US 1 ! 7962*

3 REM NEW: IN 3 UT AS: IF AS = "Y" THEN

NEW 4

4 REM ■:,

Kern 1 wil'. reset all the colours — white
paper and border, black ink — at a press of
Symbol shift - I. Thi? is ijwfiil if you are
developing a program using a strange
combination of colours. Often, af:er stopping
vuch i program, in; listing is a.mcst
unreadable.

Rem 2 will print :iur how rrwrh fr?e
memory you have left en typing a full-stop.

Rem 3 is a safeguard aga.nst Mewing a
program accidentally. On pressing New, you
mu:t input a siring. If you enter Y the
program will New. Anything else will iieah
that key press is ignorec. Enter the New afbr
the Rem by typing a colon, followed by the
New then delstir.g tile colon.

Finally Re:n 4 allows you to type .n
quantities of data far quicker. It mike-; the
space key act as a comma, avoiding the need
for using the shift key.

1C DATA 255,243,229,2)3,197,24

21 DATA 22,19,237,£3,91,92,35,

t=t+d

5,205,107,1694

235,814

130 NEXT g: ^EAD Ml IF dOt THE

11 DAT** 126,241 , 173, 20*, 223 ,23

22 UHIA 223,193,237,176,235,43

N PRINT '"ERROR in line " ;*+10:

1,201,253,1699

,126,254,1489

STOP

12 DATA 203,1,110,200,33,0,0,3

23 DATA 35,40,8,205,29,17,253,

140 NEXT f

7,604

2<J3. , /VO

150 IF a«65129 THEN POKE 65261,

13 DAT0 235,237,123,61,92,225,

2* DATA 1,174,201,1,1,0,205,23

9s POKE 65136, 120j POKE 65137,25

1,127,1101

2,015

4.

14 DATP 16, 167, 237, b6, 233, 24"?,

25 DATA 25,62,13,50,8,92,253,2

160 PRINT "PREPARE TO SAVE 'Fu

192,42,1204

03,706

nc keys ' '

15 DATA 83,92,24,2,235,9,35,35

26 DATA 1,238,201,62,40,237,71

170 SAVE "Fur?c keys" CODE a, 150

,515

,Z,S/ t 1087

180 PRINT '"PREPARE TO VERIFY '

16 DATA 78,35,70,35,84,93,126,

27 DATA 94,201,62,62,237,71,23

Func keys ' "

254,775

7,86,1050

190 VERIFY "Func <«v«"30DE a, 15

17 DATA 234,1*2,33,38,8,92, 190

2B DATA 201,O,0,0,0iO,O T 0,2Ol

O

,32,841

100 LET a-32348: IF PEEK 23732+

200 PRINT "ON s ";a+131"DFF

18 DATA 235,35,126,254,33,32,2

256#PEEK 23733 >32767 THEN LET «=•

: "ja+138

29 , 33 , 1 004

65129

210 PRINT '"Press any key ta NE

19 DATA 126,254,13,40,223,11,1

105 P3INT "PLEASE WAIT"

W basic prog. "

1,11,689

110 RESTORE s FDR f=0 to 18i LE

220 PAUSE

20 DATA li, 197,22*7,42,91,92,20

1 t»u: FOR 3=0 TD 7

230 CLEAR a- Is NEW

5,85,952

12C RE AC d; POKE a+**8*g f dj LET

Copy function

A Tug wefi.

Walion-on-Thames,

Surrey.

■
•J-vvAwv

tx

USING IHE Co?Y command 3ti the ZX-81 is s
simple and effective way :>f dumping the
cements of the screen in ihe ZX Printer but it
does nave one Lnivback — it copies the whole
of the screen even though the tottorn half or
more is blank.

Thj routine that I wrore to solve this
ptoblem is 51 byres in lengtn and, for a
change, is slower than the equivalent Basic. It
w:li alsc only work with a fully expanded

display tile.

I listing 1 is entered and Run it will list
itself on die printer and .he string prompts
will appear. If t.ne hex digits in list.ng 2 ire
now entered followed by the etrer S the
program will Poke :he routine into the Rem
statement at line 1 and then jump to line 200.
Listing 2 will be' displayed on [he screen and
copied from there to the printer by the
routine.

If ycu study lines 330 to 330 you will see
tha - the rout.ne will only copy down to the
line when; the last "printing" has occurred.

If everything has been entered correctly you
should finish up with listings 1 and 2 exactly
as shown although those \vi:h economy in
mit.d should omit lines 10, 20 ar.d 30.

Listing 1

■ 1 REM eBeiOBCaO30O00Ji{»Oe0Bi0OBC

o o o © ■ oo a o e © o o © e © © a © * e> e b e o <ne to uuu
BM

10 LPRIMT 'LISTtNG t"

20 LPfiINT

30 LL.IST

&0 LET X=103Ji

50 LET 0*= '•'

6© IF 0»=" - THEM INPUT O*

70 IF OS^'B" THEN GOTO 203

30 POKE X,L6*CODE Q$i-CCrDE OS IS
> -t7b

90 IF PEEK 16ii2<=n THEN SCROL

u

100 PRINT X;" ";0*l TO 2>

110 LET O*=0p O TO i

120 LE" 1 " X = X*I

100 00 _ O 60

300 CLS

210 FOR N=18514 TO 16564 STEP 9

320 PRINT N. ■' • ";

330 FOR O=0 TO 7

St© LET Q=PEEK (N+O)

BSe LET H«IMT (0^16)

260 LET L=0-16*H

370 LE - B«=tHUf IH<S>8> *CHR| L 1

280 PR TNT " ";0*,:

(cont'nuvd on page 191)

188 YOURCOMPLTER, APRIL 1984

THOUGHTS & CROSSES

37 MARKET STREET, HECKMONDWIKE, WEST YORKS.

Telephone 0924-402337

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3" Oi;<> ! nglt Ci.tiO

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(.artjt?. ra.ige of programs available 'or Draw, Oric, ZX8J. Electron ,Vf TX a- tiisntxtnt prices olease send for Asf.

To; Thoughts & Crosses, 37 Market Street, Heckmondwike, West Yorks.

Please accept my order for:

11. Despatch to:

2. . I\ame

3. Address . .

I 5.

P.O. .'Cheque No. . for £ enclosed.

Signed

I

Access_Vsa only accepted from personal callers. All prices include Pcstage, packirg & VAT, We also offer COD. if requneci

a — J

v OUR COMPUTER, APRIL 1984 1 89

Find out why

is Britain's biggest selling
computer magazine —

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today!

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190 YOUR COMPUTER. APFttt 1984

SOFTWARE FILE.

(continued (rem page 198)

290 IP N*0*16564 THEN

see next o

GOTO soe

Listing

i

310 PRINT

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16538

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16546

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16S54

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FINISHED"

3«B STOP

Transform

W Lytfrgos,
She/ingtcn.
Wigan.

llilS PROGRAM TRANSKHUffi drawings up to
50 by 50 pixel* in size when rhey arf
expressed in P.ot and Draw statements. Two
examples are given and then you can Inpu:
your own drawing.
First draw the diagram on 50 by 50 gtaph

paper and write it out in Flot'and Draw state-
ments. Coun: the number of Draw statements
and Enter th.s. The Enter the co-ordinates as
required.

To edd your drawing to the data s:atements
change line 110 to:

For m = 1 TO 4
rtrid add a rtew data line, following the Rem
instructions in line 4990.

Further da:a lines can be added, increasing
the final numbir in line 110 by I for e3Ch
diagram.

10
20
110
120
130
135
140
17S
180
IBS
107
1GB
190
20O

♦yii>
210

p,d<i
220
250
2SS
260
270
2B0
500
510
520
530
5*0
530
360

REM trans-form

REM W. ^ythqos

FOR m=l TO 3

IF m<>3 THEN GO SUB 500

IF m=Z THEN BO SUB 1O0O

DIM ctj-t-i>: DIM d(jM)

FOR n«l TO 33

FOR i-1 TO j+1

LE- c<i>-Ol LET d<i>-0

NEXT i

INK PND«4

GO SUB 2O0O+lO*n

FOR i=l TO j+1

IF i-1 THEN PLOT «**<*>•?,«

«q

IF i>I THEN DRAW c<i)+K(i>*

)*y <i)*q

NEXT i

BEEP . 5,n-12

NEXT n
NEXT m
STOP
READ j

DIM x(j+l>
DIM y<j+l>
FOR i-1 TO
READ K (I J I
NEXT i
RE'UFN

J+1
READ

y(i>

1CO0 INPUT "Hew many DRAWs?";j
1C10 DIM «<j+l>

1C20 DIM y (j+1)

1C30 FOR i-: TO j+1

1C40 IF i=l THEN INPUT 'PLOT x C

o-ord?' |>t(i! i INPUT "»LOT y co-o

rd?"iy(i)

1C50 IF i>i TI-EN INPUT "DRAW x c

o-ord?' |M(i ! i INPUT "DRAW y co-o

rd? u jy(i)

1C60 NEXT i

1C70 RETURN

2C10 PRINT "TRANSLATIONS"! PAUSE

200 i LET a-0* LET b-Oi LET p-li

LET q-li
2C15 RETURN
2C20 LET a=50: RETURN
2C30 LET a=0: LET b«30i RETURN
2C40 LET «-50i RETURN
2C50 LET «-;0Ci LET b-Oi RETURN
2C60 LEI B-lOOl RETURN
2C70 LET 1-0 t RETURN
2CB0 PRINT "REFLECTIONS' I PAUSE
2COi LET 3-0i RETURN
2C90 LET i-lOOi LET p— li RETURN
2100 LET p-li RETURN
2110 LET a-lOOi LET b-lOOi LET q
■h-Ii RETURN
2120 LET q-li RETURN
2130 LET p— li RETURN
2140 LET a-0 i LET p-li RETURN

7 ISO I FT n=-1 ■ RFTIIRN

2160 PRINT "ROTATIONS THROUGH 90

DEGREES": PAUSE 200: LET q=l: L
EX b=Os RFTIJRN

2170 LET p=-l: LET q=li GO SUB 3
000: LET a=a+50: RETURN
21BO LET q— it LET «-50i LET b-S
OS RETURN

21<»0 LET p=l: GO SUB 3000: LET b
-bi50: RETURN
2200 PRINT "ENLARGEMENTS": PAUSE

20O: LET a=0: LET b=0: LET p=l:

LET q-l; RCTURN
2210 LET p=2: RETURN
2220 LET p=3: RETURN
2230 LET H -l; LET L|-2i
RETURN
LET q-2:
LET q=3:

2270 PRINT "DISTORTIONS": PAUSE
200: LET a=0: LET b=0: LET p-ll
Ltl q=ls RETURN
2280 GO SUB 310O: RETURN
2290 LET q-2s GO SUB 3100: RETUR
"N
2300 LET q=3: GO SUB 3100: RETUR
N

2310 JET p=2i GO SUB 3100: RETUR
N

2320 _ET p=3:
N

2330 _ET
3000 r 0R

2240 LET q=3:
2250 LET p=2:
Z260 LET p=3;

RETURN

RETURN
RETURN

GO 3UB 3100: RETUR

p=li LET q«ls RETURN

i-1 TO j+1
3005 JET a-p-*(y<l>-x(l) >
3010 JET c(i)-p*(y<i)-x (i ) )
3015 LET b-q*C* (l>-y tl) )
3020 JET d<i>-e*<x(i>-y(:>>
3030 -4EXT i
TOAO RFTURN
3100 -OR i-1 TO J4-J
3110 JET c<i)-F#.3*<y(l)-x<i>>
3120 NEXT i
3130 RETURN

4990 REM First no. in each DATA
line is no, of DRAWc. 2nd end

3rd nos. are PLOT co-ords.

Subsequent nos. are DRAW co-ordv

5000 OA-A 3,0,0,50,0,0,50, 50, 5

5010 DATA 32,15,0,5,1,2,1,9,0,5,

2,4,4,0,6,-2,3,-3,0,2,-7,-3,-3,-

7,-2,5,4,1,5,-1,6,-3,5,-3,4,2,3,

0,5,-2,3,-2,10,-4,-10,-2,0,-3,10

, -3 , — 1 O , — 2, -3 , , — 4 , 2 , -3 , -4 , -7, - 1

,-9,1, —6 ,5, —3 ,6,-1

Character definer

Mazsn Kisawi,
Nonh Ahmadi,

Kuwait.

THIS PROGRAM enables ZX-81 users tc defmt
cr.eir own :harac:ers, using a ZX Priner.
Before entering the program tvoe S'ev and

POKE 16389.124
Now type in the program and tun it,

In :he top lef:-hcnd corner of the screen lint
1 will be repimed, and ihe program then waits

for an inpui. The character will be defined on
an eigit-by-eighi grid.

Whenever you warn a doc on (he firsc line,
enter it full stop. Whenever you want a r>lank,
input a space. This continues for eight lines,
working horizontally.

After the character has bsen defined you can
eitiiei iiiuve un lu uiiuihei churucter or type in
Plot. After that there will b: a shart pause
before the character is printed or. the printer.
To save my character use the string-saving
method. A character is defined between BS(1)
and RS (e), ■

15 POR h=l TO 32

£0 FOR P=l TO S

25 LFT Cafl

30 PRINT px »,0;"LXNB " ; >=i

40 INPUT SS

4.1 print at a+i,e;es

42 IF Bi="PLOT- THEN .GOTO S983

43 IF LEN BfVd- THEN LET 3S=B$ +

44 IF B|.< TO 4.«n"EXir" THEI>J PO
KE 1S3S4,13

1

9=31'
2
5
6

C*
Q

12

IF PEEK 1S3S3+255*PEEK 1538
■44 THEN GOTO 5
POKE 16334 .,21
FOR 1=0 TO 112
POKE 31744 + 1 .PEEK (21614-1)
NEXT I

POKE 31300, S3
POKE 31357 ,201
DIM fl*(32 ,9)

30

IF B» fij =" . THEh

LET

C=C+£

**7

60

IF BJi2> »•. • THEN

LET

C=C 42

4*6

70

ir D$ r3> -" . ■• THEN

J.ET

C=--+2

**S

80

IF 55 14> =" . • THEN

LET

C»C42

4*4

90

IF B% KS'i •" . " THEM

_ET

C-C (C

4*3

ISO

IF 53 (SI ■-" . - THEN

_ET

C=C*2

4*2

11B

TF R4 (71 =" . ' THFN

1 FT

C =<" * P

120

IF B(i3i =". " THEN

_£T

C=C4l

130

LET AS .N,A4l) =CHRj

C

135

FRINT AT Sl.&iC

140

NEXT fl

145

CL5

150

NEXT N

5990

FOR d=l TO 32

9991

FOR K»* TO 3

yyya

PUK.K 3£e55 + K*3i 10-

1) ,C0

S(U,h+l>

9993

NE'IT K

9994

NEXT d

9993

TOR H-« TO 01

9996

POKE 1644i+H,H

9997

NEXT M

9993

LET HPRINTsU5R 317

4 f

0009

POKE 1S33^,£S

YOUR COMPUTER, APRIL I 984 1 91

zz^zExplore the
Microcomputer Age
NEC

fjvoV .A***

Midland

s*W

Explore t\e excitement and
fascination cf new technology
first hand and see how
microcomputers can entertain
yas well as help in everyday life.

Al types of microcomputers
plus the necessary accessories ■ grf j

and software will be on display ^^™
with expert advice instantly available.
Business visitors to the show will be able
to see a wide range of products
desigred for commercial use on many
stands at the show.

So make sure that you vist the Midland Computer Fair and
see for yourself wnat the microcomputer dye really means.

Entry for adults is only E2.5C wnile children under 16 and senior
citizens is only £ 1 .50.

For spedal oarty r ates and further information contact:
The Exhibition Manager, The Midland Computer Fair, Reed Fxhibitions
Surrey House, I Throwley 0C/?y, Sutton, Surrey SMI 4QQ.

4P* m ioiana \-

Computer
fair

Sponsored by

COMPUTER/

1 92 YOUR COMPUTER. APRI. 1 984

?-t";\i :ki; M<\vi i>r' ;our cornpetiiions.
•i'rfir mrv. s contained in extremely
[<un:h pxor/k 1 . It succeeded :i
K'vedJot; ; ani ; all but f handful of
fwiiriti ■ sis to be precise.

The problem was that il ycu
;s;»w.i»^ oin by atiuming tIkh alt s \
Wack bjicks may be yilvaged yen
\vcre bound t.V foil. There arc
•2;9i)0J()0."> pcruiuliAiuiis uf tuinj-
uieiv. order and d.rection on this
ysjumption; and none if theni

;r|tt itiict fhr maximum number of
vixicfc Vt'U.LJis set free is f.itir. Ami
. ;Ke. ;hir.i r>ut:i number »f bricks
■you -»;i;i debtrcy on the
\Ydy: k ;V>, ioi b nl-iic. .
pv^biuik brkks. The
^rreet ;<>rd:r nl'
■roottmci; and •
fiitYcciOii is iis ii'llows:

■. Brick; -6 iv th> south-east
& tiutk-; 10 ih-. v north-west

v Brick :> to th.- north-vast
;-t; Biick^ to th; north-west
; >' : Brick ! re rlv- south-vast

[ h •k"-'- »<* nutter how he brkk
y;i.th fife - -dots mows since brick 6
c$tkes vdth it. Koth arc cons:-
CjUerrty destroyed

Tm.%. n(" tbv »Lv corrcv: entries

rfilent;6n«:d: fliai th.-y had used a
/cor.ip.iic' to sol'. e Ue [:u/./Je. If the
is.htir. ikl aui ids hi. a program
Hdiiukm ifu'virivist ha\'ebee;n;bkssei3
■kS«h tit lies Ijitkor inspiration.

Ue"veLkn-jon«>, ?A llimbcidt'e
jea.il ^Gloucester, G1J Of<Z pro-

MEMO!

all m» is of thermal sircstcs and

strains to he macrripj and himsfelf.

He should be mollified to learn

that nis ttc-brcikcr wins run-

the prize of E.Uenwtccr;

MTX 5J0. The

opening wnitnci

reai "At work and

gnnmied

p.Us7.lc. It

epjuuhg u

I coinplims.

a Spectrum to crack tr

ran for 10 hours before

i with the sclutbn, He

ilu' this imrathon created

SULTS

,tt play t Ateniotccvwoutc make my
: diiy". He conpk.cd it by iddins

; M \vilh IW<lttOry ■nVllV, iVxttCn

Colours and inirc, .what a ■ splendid
i>ive away? 1

The other piognm solution «ia!ij«i
from Yugoslavia. Jmao Puioidc nl so
used a Spectrum w/iich agcih tooklQ ;
hours ever it. His tit -breaker read
simply, "joyful and gay".

Most contenders struck a similar;
poetic riOte From 1). Stanford came
"vet It nary problems suoii nude
ligh: by solving puzzler, rhrough ih* |
night"'; A. Gran: suggested "its
styling is striking, its : iremorv
invi:iiiii. plcaM I .vain oi;c udu<",
ind K. Cross olTered 'it's th: bist,
it's :lear every day of 'he year". .

U:hers Observing; ci a '- mention
were J. Middklon's "with: fsaturcs
unique and dejijtnsoiileel*'; and R.
Pen Jails "to: liccooatisu'. oreoutii-
insj, it's money we.l Spent '.

VALUE that's
out of this world

50 GAMES ON ONE CASSETTE

DRAGON lDCDBaIb Spectrum ^cippk* ATARI ORIC-1 ZXB1 - VIO tM

" It is impossible tc ',
tell yoj everything
about the 50 uumes on
CASSETTE 50 but Ihey include
many types such as maze, a'cade.
missile, tactical and logic games,
to suit most tastes in computer
game play ng.

CASSETTE 50 will appeal lo
people of all ages and the games
wil provide many hours of -

entertainment for all the family .it
a fraction jf the cost of Older
computer fjanics. • . ; -..-

EXPRESS DEUVERT-
ORDER NOW

Please send mo by retcrn of pest, Cassette 50 at £9 95
per tape. I enclose a cieque/psstal order for

maie payable to
Cascade Games Ltd.

Name

Please Jubi!
myEl No.

Addiess .

SPECTRUM
BBC A.'B

P O^' 1 U
□ OMGDN [

ZX81
ATARI

APPLE □0

Post Code

Country

Dealers & Stockists ertQufries we/come. *&%$

cascade

a

CjsujOu Garros Ltd.,
Sjlti4 I '-3 Haywra Crescent. Harrogate
North Yorkshre. HG1 5BG. Biglend.
Talephona: (0423) 534526. yc 4-*lu

YOUR COMPUTER, APR L 1 384 1 93

THE

Success breeds success and that's certainly true of The
Compute' Fair series of exhibitions.
By incl Jding the Computer Fair
seres in your marketing plan you can
reach tnree arge groups of customers
from the consumer, business and
trade markets with your products
throughout the year, and time new
launches to coincide win the
shows, adding interest and
stimulating demand.

The continuing grown of The
Computer Fair series is evidence of their
success. You can be part of that success
if you take a stand at the shows, "o fine
out how sirrply ring Chris O'Hea on
1 -661 31 25 or return the coupon
below:

(gmputer
fairr - 1 -

Parsons/ eomputers.

HfnM csntputlfiB

SwBtt bustrtBss sfstenis

Peas; send fjrtner Information on exhibftirc
Northern Computer Fair - Manchcitcr

at:

Midland Computer Talr - Birmingham

□

Please tick as appicabfe i"

Tne Computer Far- London I

r\ame_

Position.

u f

A Company.
'* Address _

f Rstu/n to: The Exhlbtlon Sales Manager,
I The Computer Fair, Room L3 1 Quadrant House, "he Quadrant, Sutton, Surrey, SM2 SAS

Tel No..

194 YOUR COMPUTER, APRIL 198<

1

PINGO

Battle in the ice maze with
Pingo to desfro/^^S^-bs^<?
Ifyoi^rsJast^nough you may
survive!

ZX Spectrum 48k 5.95

JANGLER

leTor only
joystick adepts. Has to be
experienced to be believed.

ZX Spectrum 48k 5.95

SPACE MISSIL££QMMXND

ig waves of missiles
and only you bf.tween the earth
and destruct'on.

ZX Spectrum 48k 5.

k fully editable

•k synthesizeu^mmtfs^ortiy

•pectrum 48k 6.95

MUSIQ-COMP0SEB

* 3 channel composer

* professional musical notation

* correct phrasing

* 5000 notes

* miJsi£L£keet~s~cfolle
creen or printer

Available from your softwa r e dealer

Dealer enquires contact tetex_
Germany 9496&pfetis~G7

GCC are gaining
respect as one of

the country's

leading outlets for

the BBC micro

and compatible
peripherals

GCC (Cambridge) Limited
66 High Street Sawston. Cambridge CB2 4BG
Telephone: Cambridge (0223) 835330
Telex: 81594 SAWCON

BBC MODEL T

£39900

BBC DISC INTERFACE KIT

J. 78.77

A-B UPGRADE

£ 70.00

Z30 2nd PROCESSOR WITH SOFTWARE

£431.00

GCC ROME* 13 (fiom expansion)

£ 45.94

GCC EPROM PROGRAMMER FOR BBC

PCA

BEEBASE(Dsla Base P.om|

£ 45.^4

WORDWISE

£ 44.65

PASCAL ROM

£ 67.65

FDRTH ROM

£ 39.93

TEAC Slimline

Disc Drives

GCC 55A 100K

£160.00

GCC?00K|ultra-sim|

£199.00

GCC 55F 100K

£246.00

GCC 55A2 2O0K (dual)

£325.00

GCC 55FI 800K (dual)

£505.00

GCC 5DA2 I ? 3U 200K (40/80 Sw tenable)

£34G.0O

GCC55FI + PSU80O<(40/8CSwichcble)

£575.00

Dscdnve cables single

£ 12.00

Cisc drive cables dual

£ 14.00

FrintBrs

STAR 5 10 80 :ol

£251.85

5TAR515L32co1

JL2//.lti

SHIN/VACPfiO

£256.75

NEC PL 8032-C

£256.55

Printer Cable lor BBC

£ 0.E7

JUKI 6100 |DEisy *heel|

£437.00

EPSOM FX80

£407.00

Sinclair Computers

ZXSpectrjm L6K

£ &9J5

ZXScectrjm48K

£12995

ZXPrnter

£ 39.95

Other Products

TORCH 280 Disc Pack

££39.50

APPLE EFROM BLOWER

£ 86 25

GRAFH PAD

£14375

LKM PEV to' BBC

P0A

Vancus ether software and addons tor the tiiC

available from GCC - please phone for details.

STOCK SUBJECT "O PRIOR SA.E

ALL PRICES INCLUDE VAT. ^^

:■ .'

Self Adhesive
Cassette Labels

^ IDtAL K)H THE- SOFTWARE COMPANY

it AVAILABLE IN ROLLOR SHEET FORMAT

^ NEW RANGE OF TINTED LABELS

St 24 Hr SERVICE FROM STOCK

^ 48 Hr SERVICE ON CUSTOM PRINTED LABELS

CASSETTE LABELS
ON A4 SIZE SHEETS
White onl^, su tabla for
ima!loff*Monhtinti
or photoopying

100 Libols. C3.50

:ooubeii

2COUb«k

<W Libels

!O0t.H;ul.

£6.00

EB.2S

£10.00

£12.00

CASSETTE LABELS ON ROLLS

Complow win tractor feed perforations :o alow

use in misi computer primers. Now available in

whlt4 or »ntod blu*. pirk, gr^on at yclow.

Minl.flurr order 500 lab*ts

50C

Had

whte CK.ee

TINTED E1E.90

1CO0
labels
(20.70
£14.15

2000
bbelt

£3i m

E37.S5

All Prices include VAT and postage/ packing

Excellent discounts for large quantities

Please send stamp for printing prica lists and sample labels

JNIT A4

SfclEEO-DEAN CENTRE

EUTOL NK INDLSTFIAL iSTATE

SITTNGBOURNE

KENTME10 3RN

Self Adhesive Compuier Labels - ^^Up&V 6 " "

SILVER LINO LTD 156 Newton Road, Burton on-T rent
Staffs. DE15 OTR. Tel (0283) 63987

TOWNTEST BBC/B £6.50

A veiy useful nirl fnr leaching ripnrji.iphy in primary tchooli,
this program tests pupil;' knowledge of th: locations o
majo" towns and cities in England. Scotland and Wales. Afcl
presented, with a high-resolution map

BIOLOGY BBC/B £12.50

A su le of programs using text, anirrated degrams, examples,
and T)iiP":tinrK tn attici in «h*» iindprttindinrj of Biology to
CSE, 'O' ard 'A' Level standards. Mo:i suited to individual
use by student;, these programs also contain nateual teach-
nrs can extract lor classrcom demonstration Topics covered
include he Eye. Edr, *fntfh, BlUOtJ mkJ Cinuliinuit, Skeleton,
Female irproduction. Genetics, Biochemistry End the Genual
Nervjus System.

ENJOY MATHS 48K Spectrum £3.00

A suite of 4 highly motivat no, prngrans for ihe 8 14 age
ranqe: tables, simple etiuat om. polygons and areas. The
p ogrami crjmbinc e>:planai on wiih tests and nake good
use of Colour and sourd.

MASTER DIET PLAI\NER 48K Spectrum £11.95

The ultimate h det programs, ihe MASTER DIET PLAN-
NER coitains detfils of calorics, protein, vita-nirs and ether
nutrient! tor 6&1 toodf.1 The MASTER DIET PLANNER will
ii?lp you plan a well -balancer! diet, including opiions to
restrict lats, cholesterol and salt, or io increase fibre intake
a" the Stmc time offering maximum choice ol foeds. Insruc-
tionsanrt Recipe Book included.

ALL PRICES INCLUDE POST & PACKING & VAT

We require good programs to increase our catalogue
3rd pay high royalty rates for published material.

1 96 YOLR COMPUTER, APRIL 1 984

ki

ft

MCODER II - The ultimate interger basic compiler for the 48k Spectrum and I6K ZX81

Many claims arc made about mos:

Basic compilers on the market, but

always remember, in programming "you

don': get anything tor nothing. The more

features a compiler otters, the slower it

will run.

In our opinion, if you arc writing
games, you don't need floating point
routines, and you don't need string
handling as it is in BASK, - just high speed
integer manipulation to turbo-charge
your software.

If you arc in any doubt that MCODER II
is the program you need to give your
BASIC programs the instant speed of
machine code, why not write or
telephone (0203 ) 667556 for a list of
features and a comparison chart showing
the relative strengths and weaknesses of
the major BASIC compilers currently
'vaiiable.

To give you every commence
in our product, we also offer a
NO QUIBBLE GUARANTEE to all
mail order customers. If you are not completely
satisfied, simply return MCODER II within 7 days of receipt and
we will refund your money - no questions asked.

SPECIALOFFER Purchase MCODER II by mail order
and we will knock £2.00 off the price. That means you can
buy the Spectrum 48K version for just £7.95 and the
ZX81 16K version for £6.95.

NO FRILLS-PURE SPEED

SEND CHEQUE OR P.O. TO PS.S.452 STONE Y STANTON RD. COVENTRY
CV6 5DG. FOR INSTANT CREDIT CARD SALES TEL (0203)667556

5.8*

NEW RS 232 &
PARALLEL PRINTER
INTERFACE for
ZX SPECTRU

Connect to professional
printers with this
Centronics interface.

ZX Lprin* III interface enables your ZX Spec-rum
computer (16 or 48K) to print on almost cny dct
matrix or daisywheel orinter with RS 232 or
Centronics nput. JLst plug n ZX Lprint III and
LPRINT and LLlbl commands will work. COPY
wo'ks without any additional software on
$<?ikosha 100 & 250, hi-ros Eptons, Star 510, 515,
STX 80, Gemini & Delta, Walters WAA80. Shinwa
and CTI . . P us Seikosha GP 700 in full colour.
COPY on other printers corrming soon.
And because NO addi'ional software is needed
all of /our RAM is free to take Tacword 2 or
Kemp Business Accounts, Viewfile etc.

WORD PROCESSING

HIGH RESOLUTION! SCREEN DUMPS

PRINTS SPECTRUM AND UStR DEFINED GRAP HICS

JLST PLUG IN FOR LPRINT LUST and COPY

COMPATIBLE WITH M I CRODRIVE* AND

PRESTEL ADAPTOR

ORDER: To EUROELECTRONICS , 26 Clereree Square,

Cheltonhom, t>tos. OUrtl 2JP Tel: (0212) 5B2D09

From: Nome:
Address:

This orcer s tor:
ZX LPRINT III ot £34.95
Centronics Cable ot £9.95
FS 232 Cable at £«.95
Tasword 2 at £13.91)

(Quantity)

Cheques PO paycble to EUBOELECTRONlCi olease.

Amount enclosed £

Micrad»c adaptor for ZX LprJnl I uiid II £4.30 ■+■ 70p pSp

Computer Bookware

and Software displays

up-to-date titles at these shops.

LONDON AREA

Louden: t ir&Eai , tuainevi Hi. a Centre
Mixxfieldk

I i.rdon: Dillons Q.VLC. Bookshop. Queen
Mar7 Col uu.

London: Dillons University Bnikshop,
Malet Street.

London: lm[H*'i:. U'Ulf-gr tioefcehep.

ImpcriaK'o!li:u:

London Modem IkoJt Co. Lut PriodSieet.
London: W v «iG. Foyk I.'.il.

( .'I dl I I! I- ( II V- , Road

Croydon: Webster's Bookshop.
Whtlgifl Centrr.

Utbtidgt Hrmcl University Bjokvtop.
Bnutcl Unversty.

Witfcrd; A'atfnd TsthnKnl Bixsks.

Si Aibanj Ruii_

EAST

CimbHdRc: W Heifer Bnikwlcn,
3l i il.-.: . Rim

MIDLANDS

Bedford: Pcmbrrton Ifcwiselle-, Mil Street.
Klrmlnghim: Hudscns BeokslKjj. NswXtect
3 Inn ins him: Midland Eliieitliinnl 'Jo. Ltd.
~iirp»ralitn Sucec.

l-'ninlcldtC raifii'Kl ftooiStlOp.C oli'ge KVvail,
vVhailey End

Coventry: Hud.c-ns Book-.hop, Eari Street.

Osvntrjl Mi ■ i .« :r. Bookihop.

Hcnfird Street.

Ktttr. Siixfenu Bootstioc.

"JnivtTvilynr Kerlr

Leeds Auiiicl! Bixtishop. Cookridje Street.

Leicester: Howes & Bowet, Hooetiur StrtcL

abetter Hudioiu Fookdiop Ltd.
High Street

Lelceiler: Univmicy Bookshop.
University Roal
Lougiborougb Hi.; - n-. Bookshop.

<wigkrxwcugh College.

NoiiiighRii: SESons Paperback Bookshop,
Mi not street.

N'onl ighan: DllonsUnivorsil; Binlshoi Ltt

UnivirsityPiirk

stjerrrid: 3owesei 6o»v:s,CrupCl Walk.

Sheffield: .V, Banlc; See J Ltd WcsiSli.-cl

Wolv:rhaDptoa: Hidsaix Bin kshni Ltd.
Victoria steeL

NORTH

Chester: B:»kUndoitCo..Chii»:h Street
Liver >ool: fUtvx* & Howes, Lad Street
Liverpool: Pnrry Books Ld. Brawnkw Hill.

Manchester Haigh& I !■ ehl -.n : Ltd
O.\ford Roid

Manchester Shemttt & Hughes.

£1 Ann? Sq-iare.

Muelnur W, H. Wtlihiw Lti Join

DalUxiStraL

Newcjiillr'iipnnTync ThrfTK WiiA>«r

Bookshop. Porey StreeL

SkKkport Slientllet Huglet.

Princes Stre:l

SOUTH

Aslngeon: Dene Buobhup

Ent Si Helen Street.

Urighliin: Qiritixb Bookshap,

1 .ll.l! ..■.:! SlrtL'L

Brighton: R.)liui»iris Kij>:i'i>:v. Jond Street

CiwIq: H«ik\ KiMik-ftopS Ltd.

I Uslctt Avenue.

Guildford: Univusit) Buul&liup,

t.lniwnity at Surrey.
Guildford: *Veb«r's 3ookihop,
T«igat: Square.

Kingston-uton-TltanitK Boles t:rvik>hrip
Udcn SseaL

Otfurf H II Blwk*cU Ltd. Brad Street

RudlnjF VVillian; Smi h Ltd. Loidoa Sucet

Sbujli Carer & Wheeler Ltd. High Street

S(-ulhnnipl(ii: B . ■'*..--. i Hiwes. \bovc Bar.

Sf'Ulhflinprrn- RmhmA Ki**-cf

Uiivenily II;-. W.?p
Watcrle-ovNe; Bty Tree Ba>ksluip,
t.nl>:::lT Rotd.

Wokln{hanr Batis Bookselcrs.
Peach ilree.

WEST

Uiiveriity of Bah: Btwej i Bowes
Lnivcrtiry B»kslop

Btlilnl: GetT};e"sLtd. Park Stree .
Hitter George's Soobhop, Siduell StfMt,
Eitltr. University Bookshop, Sticker Roac.
rVmiiLth: iiooksilkr, Drake Cirrus
. Pl/nwiOi; fleiir>y"solPlyr60utli,
■\- 1,- i: Wav

WALES

Bjngor Bookland & Co.. High S:reeL

C'jrdiff; H. ;. leirr Ltd Royal Arcade.

SCOTLAND

Abenle.-n: Junes G. B.uelt Lid.

Ucperkrkgate.

Eclnburuh: nmirinwiercrB/oVte (ere.

Gtorge IVEridge.

Ecinburgh: Jame; Thin Ltd. Souil Brdge.

Eeinbunb: rCimtlflns Unhrtcriry Bootilnni,

Teviot Place.

Gbigo*- Jnhn Snithi Soev
StVincertt Street

■

1
1

publishers of computing books
for over 25 years

198 YOUR COMPUTED APRL 19B4

for the latest information on all aspects of computing

For information on over 400 up-to-date PC and microprocessors titles please
write to Jean Walmsley at the address below forour latest catalogue and order form.

66 Wood Lane End, Hemel Hempstead, Hertfordshire HP2 4RG, England
publishers of computing books for over 15 years

VOIR COMPUTER, APRIL ' 984 1 99

1984 On Course
For Record Computer Sales

Sponsored by:

S'O'MEWjTiEI

There can be few - if any - comparable
exhibitions capable of generating such intense publir
interest as The Computer Fair series.

As expected, the 1983 Computer Fair, held at Earls
Court, has consolidated its position as the majcr
showcase for home and small business computers, to
the extent that it became .leuzssmy for the original
exhibition arec to be doubled to a record 2,200 square
metres. And all the signs are emerging to support our
belief that 1984 will see further growth in an
exhibition which provides an unrivalled opportunity
for promoting persona: computer systems of all kinds.

THE

(gmputer

fair

^K Earls Court, Londoi

Personal computers
Home computing

Snutff business systems

Sponsored by Practical Computing' and Your
Compire.r' and organised hy Reed Exhibitions, the
1984 London Computer Fair will again be backed by a
massive publicity campaign using radio, television
ar.d press media. Advance stand reservations are
understandably already well up on 1983. If you want
to ensure that you dc not miss out on a preferential
site, you really must fill in the coupon below NOW,
ar.d return to the

Exhibitions Manager, The Computer Fair,

Reed Exhibitions, Surrey House, Throwley Way,

Sutton, Surrey. 5M14QQ

I am interested in exhibiting at The Computer Fair, Earls Court.
London. June 14-17 1984.
Please send full informa'.ion to

Kame.

Position tn Company

Company

Address

.London. June 14- 17 1984

Telephone No.

TpIpv.

NTERCEPTOR

PRESENTS

WRITTEN BY

IANGRAY

MUSIC BY
CHRSCOX

PRODUCED BY
RICHARD JONJES

m> r *Q

•'"_. ".•'"'"• "" ' '' '.';

mEtjim^Z

"VKk&y ag^

jW

ORIENTAL
EXPERIENCE
I WITH

30 LEVELS!

%

:«^,

A

v.
i-~ 'A;

££^

SUITABLE ! FOR THE

pmmodore <%k

sa^aisr^i-^zafiai

i

I

I

GOES DEBUGGING

O

Vf vr

\

Any SPECTRUM— £5.95
Lookout forCOMMODOnt '64!

.tick Ccmoati tie.

bthbrien 'ACTIONMASTER; 'WARMASTER' and ADVENTIREMASTER" games are
iivailciblurtuni JulirtMuii/ius. LigtilnhicUiialuibiiiul leadirnjsolUvr-retuHels. Foi cicuniplele

list send for our free colour Catalogue"

M C Lotrlorien. 56a Paik Lane. Poyntcn. Cheshire SK12 IAE. Telephone 0625 876642

[CD] software I Spectrum Programs

ABSOLUTELY OWrUNTEEO ABLE TO BE^

Superchess 3.C Imsbea i dovelouud to bring yju the strongest chess prcgran yel lor
th= Spsctrum computer
At Ihe tournament level Superchess 3.0 has a lo-ck-atead ol live to seven ply

(nrovoc) In tho mlcdlo jamo, and ten to twelve ply in the Gnd gsmo. TJis grsos

Superchess 30 a substantial advantage against other chess programs and
premises tie experenced playeran interestinp, ani challerging game 01 chess.
Unike other chojs piograms. Superchess 3.0 i> noi jus' a b'ute-forc* calculator,

but omplOya ailltiutal inrtQlUgencto iQSlVktquac to allow duopcr coaching Along tho

mainlnesbfptay.

FEATURES:

* 10 Uvets— altpiaj wltHn icurnanem tim»
limits.

• Fiirf luvel mule espftc ally easy toi Beginners
Easy to i>so— lic'i muf.us |ro»nlcKl
Reco«utiond*d move vptiou.

Change udei andleve' dumg n,3rne.
sen play mode.
Sol up.'chaiiijs posltlor.
Tacmical information— how we program
thinks*.

Programs internal scoie 101 poslton
displayed.

Nunber ai oaiuaied ptssiiii^a oispuyen
Library cf opening mo\as.
Select your own coicui schame lor
graphic joard di33lay.
3oi«e rn*tlr\<j|ifoti«imi— up lo mole .n lojr

48K SPECTRUM-Price £8.95

U f

SUPERCHESS 3.0

sorcwarei

PlIMBAL-t-

rFor any Spectrum

WIZARD

Superb, colourfjl
tast-action grapnics
and sound give this
game the feel of a
real arcade
pin-table.

With realistic
launch, flippers,
bumpers, high-
score, oonus scores
and freeball
features.

Be a Wizard!

FOR ANY

SPECTRUM

£5.95

Dealing— the program shuf'les, deals anrJ sorts the cards lo produce randornly cealt
hind?, An almost nfinte number o' hands are therelore sosiible wtttl all klncs of

OSKIDuUOnS.

Bidding— is in tna lamina ACOL system including Stayman anc BUckwoDri
conventions, "mu tidyour hand while iht Spoctruti bids tl"e otter three hands.
Card Play— vcu play from y'our own and dunini»'s hands, which are Jisoayod as
they would be it the Dri3c;e:ablc. with the prog/an playingthe allien two hards.
Scoring— at ire end of each hand the store is calculated, including honoirs, slam
and rubber points, Bath the old and raw scores are displayed In theusuil manner.
Roploy ot the end o< toeh hand, oil tout ho"ds con h>; displayed and, il docirod, tna
hand'cplayed.

48K SPECTRUM
BRIDGE PLAYER-E8.95

An id-aal complement io ihe Biido*
Player Program:

Bridge Tutor (Beginners)— £5.95
Bridge Tutor (Acvanc9d> — fS AS

SPECIAL OFFER:

Bridge Player and both
Bridge Tutors— £18.85

Flus tar 4BK Soeclrurr unless olheiwse
si alec

PLUS tor '0K Specirum

FLOATING PO NT FORTH with EDITOR E13.9S

INTEGER =ORTH E9.9i

SUPERCHESSII E7.9i

SUPERCHESS; I---/--;-- 1 E4.9S

l6KSUPERCHESS<t6KSpectrum) £6,95

REVERSI £8.95

DRAUGHTS £5.95

BACKGAMMON 15.95

SNAIL LOGO (Turtle Graphicsl 19.95

GOLFING WORLD tS.9S

^■.,^onri48K Spectrum JMBBSi

This is a superior machine ode loot kil wi.h cne hunjred machine
code rojtines that arc rcloca.abl? for use in your own BASIC and'or
machine cede programs, the combined user friendly BASIC program,
48k Spectrum onlv. g ves easy access to all roul net: • In Jex ol
rout ncc, • Call lm cbleulo of each lout nc including oil information
reqLired to tailor the routine to ycur neecs. • OemDnslration of how
■he routine works under software corvtrn , the demonstration is
ropeataale. • Saw and verify indivicual routines. • Comprehensive
user guide.

1

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15
IS
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•6
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23

Uioo I rflUfiel*

L",ti-SKr,rnmmri
Super JltTMNMI
1* pyfc Convener
Pec-HenCe'iwiie'

lie- Dn.Cwiniln

Rcmuii ccndsfMr

On C'ror CdIo
On &«il. 3o10
"M.-t-S::n.|,.-i

HvrC-tr LMsc!5

Scietn a*ftich
t^aijabteu SnanrtfLisi

?A I nr? Pi.r.linr
Slar Jraw
T<*t) SwiX->
firign Swlcf.
PeinlShaBt
Hacaa ScunD

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Mrtnofy AVIUM*
Line ricr.tr::«

UniNW«50uiJ Ll*i
Ou»-Noit S»jid fin
UfiiHnrpS'Ttl^lo?
Mul i>0«cp S"»jiat="
0cn«h i >ii
Scii«'> S10l#
ScfMin rjcr-.ifttji'
P'tfecl F-oqrLTi
Hln> Copy
LOaUtCI
t*cand

cWii Ptagrftr
tafc HoirJn ■ Hnarttt
Addr^tS
0«r.lsi>r 8nar«i
RtnoM CciGurs
Disalav Merror,
H«; Ls.^iJ?i

4? Win Kt y

4B Snniasia Li>B«rCa*«

•is siti'njMvutHivCiraw

TO Program '.o ^ctJct Case

Ol IMjg'Ar. to iw-i(,'i»

ft^ dnluM

S3 C-lfcrily

s* apacrf savrr

66 St'BtJi'Ove'J'"!!.

SO St*ecr*ir.. , er

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60 lo< Cfsnoe

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nyulir=-, 66- T C0 tti eei iuu intra

SUPERCODE£9.95

Also ivaiable at Boots, W.H. Smitn end all gocd computer shops.

OELIVERV": Send SAHforCaUlonue.

UK— rjriCBs include VAT and poitage & packing.

EUROPE — add iOo jer crouiam

AL. OTHER PUCES— toi u i mail add £2 tor Hie firsl piorjrarn and 50} foi

eactn subsequent program. Suflace col ivory ^jj y)p pur program.

Send Choyuo. Poslal Oidur o' Access No. to

frrilET^f^ r-v/-/— no l CP SOFTWARE. Dept W1Ai
MU-JJt)UI L,V<Jcl fcJ| i7 0rchar<!Lane.Preslwood,

Bucks HP16 ONN

More than fun and games!

o

by PrlTior EaucalionaiSoftwara

The ever-popular Mr Men help prepare
young children for reading with four
sirr pie and absorbing games designed
tD exercise essential skills as well as ertelain.

An easy-to- jse, colour-ceded key guide
is included with an illustrated in:rcductory

book, featuring the Mr
Men. For ages 4 to 8
years. Available now on
cassette for the BBC B.
Spectrum 48K and
Electron £8.95.

mm

by WdQi: Software

Two mind-stretching, space-age games
to test mental arithmetic and nimble
fingers,
n Sum Vaders alier robots invade the
earth. Only quickthinking and fast reactions
can prevent them. Several levels of difficulty
anc a two-player game with a handicap
option make Sum Vaders equally testing *or
all family members, "rem 8 years to adtlt.
Robot Tables challenges the young
player to make a ser es o' perfect robots.

Knowing your multiplication
tables is the key to controlling the
robot-making mach ne. With a
learning mode and a testing

■J3

for early learners,
and more ad-
vanced children,
to master an
important and
often neglected
skill.

Available now on cassette for the
Spectrum 48K, Ccmmodore 64, BBC B
and Electron £6.95.

OESAR
THE CAT

by Ancrcmeca Software

Meet Caesar, a cheeky young cat on
duty in a well-stocked larder. He's
kept busy chasing a gang of hungry
m ce eating the family's food. Playing against
the clock, you guide Caesar along crowded
shelves to pounce on the mice

A fast, colourful, all-action, arcade style
game with catchy music and a best-score
record. Challenging for high-scoring arcade
addicts as well as great fun to play for the
novice. Available on cassette for the
Commodore 64 £8.95.

mode RobotTablesisafunway

SOFTWARE FOR ALL THE FAMILY

I

I
I
I

ToMIRRORSOFT.PO Bun 50. BumiEV,

Kei!BR25IT

Please seridme (he fo fov/hg (enter

nu nber required ol each Hem in

the space prwidcd>.

fist Sins wiilhe »< Mm (MMtm

QiicfcT'inkin.nUTi;
C; esanieC3 :(CC0(l
C;csartiea:(CCOIj

I enclose a deque/PC tort made pavable

to "Readers' Account: Mirmr Group Nlev.-'paptrs Lsl".

luiiJersiana:ri;nmy
rerrittancewHbe
hell on my behalf n
theiankacmunt
named aboveu mil
the goods arc
despatched

Or plf asc JC&il my ACCESS/EARCLAVtAftC tor the sum o= £

cardwr— jj-j | pr-r-j-

.

Signature .

Mame ...
Address.

Postcode

i:-., . ..- n- 1 -rrji titr in, Cirjeiiy ncaM*tMiipie:3d.p '»■ li-imjiiB'eUK MMtOWl t. i rjicituiwur wr. jimit JtitticMMH'W! -tH ,Ci R*q !J:i 'I35a0 Irj (her HotWrCcu I ;!•■::<• r 01

I
I
I
I

J

S pectrum 48k

MAKE VOUll OWN IV FILMS!

■«. LIVE ANIMATION
& MUSIC

SAVE them. . .

* AHUEE FFITE5D8 ANT FAMILY

A" II IN YOU PLAY THEY BACK!

£ k

1 A talk!"

9 SPECIAL MACtO-rROORAMmHG^ECHNRUES ALLOW TOO I'O: •

• f'* .i.-rp iKv MFinnrn np riBT inim.cdisg CFO, hrlicoptsr

AND A MOST OF , liltlOXHL [N A CHOICE J F NEARLY 30 'C/LLH
MAKE EACH ANY COLOUJI - LARGE OSES CAM BE IE TfO COLOURS!

• TlliV WALK. »L'X. CLtMt t ?LY.

• BUILD HOUSES, CHCRCKES ETC. IN V FLASH - - ERASE THEM

• CP TO 15 MISS. PER 'TOM', OR MO*E IF VOIJ'Rt * GOOD DIRECTOR

• MAKE CHARACTERS 'SPEAK' IIRtEC AMKOT A rtO'JS /,£ if STRIPS.

• FU1.L COMPCTEB-PBOMPriNO TO SAVK 1TOV MAKIKJ ERRORS.

• [MBtABT PLAVUACK. EDITING ADD PEtSTlXC- AS YOU CO iLOSO!

• MOST COMMANDS ARE A SINCL.K KEY-STItOXE, VITROCrt "ESTSR'.

• coMrciE tot* on'ji TVKBS caiNO tki jui-'iA. tiibbi-oitaih
CHIOMATIC MUSIC COMPOSE*. VftlCH ALLOWS YOB TC l.HTES,
CORRECT ^NII KBT AT EACH NOTE ... IP TOU HEED TO!

■ STORE UP TO NINE 9S-Nt'TE THJiES TO CALL-TIP' AT ANY TlUb
IN A STORV ... CJMIUTER GIVES EACH A MIMUR IK MEMORY.

• CHANCE T..NEK AT AKY TIMI, EVES WHILST KAKIBO f 'FILM*.

• VOU CAK IV EK AbD i EH; PECTtV E TO UU I L JI.N&S , ItUADS ETC.

• NO SPECIAL fKILlS ORCOVPLTER KNOWLEDGE NEEHEB , . . JOTT (MAIHKATIMl!

®|- SB, IM SKULKS! PARK,

pnexrs' data studios « ffi?? ^«g^

impORTahTj ton <»K spf,:tkihi OKI V

Educational Software | LQL.

BBC Micro

ZX Spectrum

unexpanded VIC

Electron

ZX81

Apple

PET £.

Commodore 64^jJ.

All software for the
above computers.

VIICRO MATHS 2<1 program revision or sfilf-:uition course to O-.evel.
i24.50 (except ZX31 t12 0O).

BRAINTEASER5 IBBC. Electron. C3M 641 Book of programs to puzzle
and amuse neople who want more than arcade games ££.95.

PICTURE PUZZLES :BBC & Electron only. Early learning tun
ushg educational ;usti. 3D graphics. £6,50

ANIMATED ARITHMETIC Teaches jsing moving colour pictures Inrji
woidsl Ages 3-t. C6.50 disc O.SO).

MASTER MATHS (Appc, Pct and C8M G4 onlyl. 50 ptogrurn 0-Lev«l

xu'bi- or icachsr's aid. amazirg graphics.

". . . ih° pogrammng staniart is high, ftxt programs are robust . . "

TIMES EDUCATIONAL SUP 3 LEvlEMT

Imrrediate dispsrcl" Mi;ro Marhs. anc Mastc Mjths Phone or send
orders cr requests lar f*ee raulogue 1200 prolans! - o:

World leaders m terths education"! suttwtie
Iftsiribuiers in ?4 ntuntriesf.

LCL

26 Avondale Ave.
Staines, Middx.
Tel :0784 58771

24 hrs. Orders

Avt«M

*9ff*

GENEROUS TRADE

DISCOUNTS.

<x o*

Vi

ARCADE ACTION

FOR THE
ZX SPECTRUM

The Protek

joystick

interface simply

plugs in at :he

back of yojr

Spectrum anc is

compa:ible wth

awide-angeof

software, inciudirg bestsellers from

Quicks Iva, Ultimate, Ocean, A.F., CRL, and other leading software

publishers.

The spectravision joystick contro !er has a handy pistol gip, top and

base fin; button, and rubber suction cap footirg for s ngle hand

ooeration.

You can buy then sepa^tely or in a special presentatior set which

comes ronpktp with Airliner, a flight simulation progranrne.
Either way, they'll give you maximum fun
whenever you play the computer game.
Now available for the B.&C at only £19.95
(inclusive of joystick & interface only)

NCLUDES AIRLINER FLIGHT SIMULATION
PROGRAMME

COMPLETE SET
ONLY

Protek Computing Ltd, 1 A Young Square,
Brjcefletdlndustriil Park, Livingston, West Lothian. 0506 415353.

v OUR COMPUTER, APRIL 'SH* 2Vb

otball Manager

Designed by Kevin Toms

This outstanding game of skill and
strategy is now widely available'
and you can join tne many .
thousands of satisfied customers
who have purchased tne game.
This is no five minute wonder -
you will be playing this game
for hours over many weeks
(we know -our customers tell us!).

Some of the features of the game:-

* Matches in 3D graphics + Transfer market

* Promolion and relegation * F.A. Cup matches

* Injury problems * Full league tables

• Four Divisions * Pick your own team for each match

• As many seasons as
you like

• Managerial rating

• 7 skill levels

• Save game facility

Commonte about tho game from pre*s
end our customers

"FOOTBALL MANAGS? is the best game
have yet seen on me spectrum and my
personal favourite o' alt tne games on any
micro ... To the ordinary person it is an
exueileit view of what can De done in Tie
field of computer games ... The cownirg
glory of this game is the short jet pieces of
match highlights which show ittle stick men
tinning around a pitch, shooting, defending
and scoring .. It Is a compulsive game but

K so pic who oannottak© game sessions of 9
ours or so, which happened on one heppy
Sunday will be grateful to mow thai there s
a 'save ro tap©' ootion. FOOTBALL
MANAGER nas everything it could ...The

Ion from the Spectrum version

'ZX81 Chart.

Home Corrouting weeWy 1&8.83

originator, AdcictiveGames, certain y
deservethe name." Rating:19/20 (Practical
Computng- August 1983).

"When I irst received this game I spent the
best part of the weekend playing it. Since
then I hav© returned to itmoro often thar
any other. Tie truly addictive quality of Ihis
game isthe remarkable way il mirrors the
real footooll manager's prcblems ...
"(Personal Computer Games -Summer
19B3)

"It's rry cwn fault you did warn me - 1 am

totally and completely hocked on FOOTBALL
MANAGER." (rW. A. Wright - Lancashire.)

"It is ty far the best software game that I
heve seen for the Spectrum (Mr. N. Lincoln
— Surrey.)

"I congratulate you for a marvellous game
which Keeps the plover enthralled." (Mr. N.
Creasey-Gerrard's Cross.)

"I am writing to eav whata groat garre il is. I
have spent over 45 hours on it." (fvr. D.
Fearn- Gloucestershire.)

"Your FOOTBALL MANAGER game is
terrific." (Mr.N. Curnming- West
Bromwici.)

. ■!

mailable from computer software stockists nationwide, including @> &WHSMITH$»

Prices: Spectrum 48K £6.95
ZX81 16K £5.95

(N.B. 3D GRAPHICS ARE NOT INCLUDED IN

THE 2X81 VERSION).

owfseos oners acta woo

To order oy mai (p&p free) send cheque* or

poslcl order; to:

vlddlctire Games

Albert House, Albwil Ruud, ftjumennouih BH1 16Z

1 Spoetnm vwsion only

Dealers! For urgent stocks send

your headed note pa per direct to

out address

77T

mmmmsxsMiEiMMMxnmismxsmmiiMi

LORDS OF TIME

Joins uur range uf acclaimed pure-teAt puzzle adventures, at £9.90, for:
BBC 32K COMMODORE 64 SPECTRUM 4»k LVrVX 4aK M45C0M :<;r. ORIC 48K A74Rf 32K

5

5
3

ADVENTURE
REVIEWS

"Aciveir.Lirfes which nave a fast
response time, are
spectacular in the amount ol
detail and number of locations,
and are available 'o cassette
nwnfirs Simply smashing 1 "

-SoH,Svpl83
'Colossal Adventure is
included in Practical
Computings top ten games
choice -or 19£3: •Pontic,
moving and to jgr asneil."

- PC, Dec 83

"Colossal Adventure . . For
once here's a program that

lii/esupto its name . .a
masterf jI feat. Thoroughly
recommended '

- Computer Choice, Dec 83
Colossal Adventure is one ot
the best in ts class. I would
recommend it to any
adventurer''

-Acorr.Uszr, Feb 84
"Arivnntiin* Quest This h?.s

always been oie of the best
adventures for me as it ssens
to ccntoin the lot. n all it took
me about e ght months to
solve."

-PCVt, i am Jan 84
"To sum up, Adventure Quest
is a wonderful oroaram, fast
exciting and challenging If \ou
Ike adventures then this one
is for you" _ NliU0 issue 13

"Colossal Adventure is simply
superb , For those who want
to maveonlo another
adventure of s milar figh
cuality. Dungeon Adventure is
recommended. With more than
200 iocatiens, 700 massages
snd 1 00 objects il will tease
end delight!"
- Educational Oxnftitity, Nov&3

MIDDLE EARTH ADVENTURES

1: COLOSSAL ADVENTURE

A complete ful size version of the classic maintrcme game
"Adventure' with 73 bonus locat onsacded.
2: AOVENTURE QUEST

Centuries have passed since the tirre of Colossal Adventure
and evil armies have irvadedThe Land. The wfey i< long and
aangerojs; Out with cmning you can overcome all obstacles
on the way to the Black Tower, source of their denomc
power, and destroy it.

3:DUNGEON AOVENTURE

The trilogy is completed ty this superb adventure set in :he
Dungeons beneath the shatterec Black lower. A sense of
numour is essential!

THE FIRST SILICON DREAM ADVENTURE

1:SNOVYBALL

The first of Pete Austir's second trilogy The giant colony
starsiiD. Snowball 3. has bee i sabotaged and is heading for
the sun h this massive gane with 7000 Iocatiens

ADVENTURE
REVIEWS

"Colossal Adventure . .

undoubtedly the best
Adventure game around. Level
u Computing have worked
wonders to cram all this in:o
32< . . Finally Dungeon
Adventure, last but by no
means least. This is the best
of th© lot - a truly massive
ad'/enture - you'll have to play
t yourselves to belrve i:."

CBMS4 V3en Clt/b ttewzfetter

"Tie puzzles are logical and
the program s eittrallmg.
Snowball is well worth the
money whict". for a compu:er
program, is a high
recommendation."

- Micro Adventurer. Dec 83
"Snowba I . . As in ;.ll Laval 9 -;
adventures. Ihe 'ea pleasure
comes net from scoring pemts
i.'i. In exploring Hit; world in
which the game is set rnd
learning cboul its ders ens .
this program goes to prove
thtt the mental pictures
conjured up by a good textual
adventure csn be far more
vivid than the graphics
available on nome
computers."

- When Micro?. Feb 84
: Lyids of Tine. This program,
writen by newcome' Sue
Gazzard, joins rry favourite
series and is an extrerrely
good add tion to Level 9's
consistertly good cata ogue . .
As we have come to expect
from Level 9, the program is
executed with vuonderf jl style
- none of those boring "You
can't do that " messages!
I lighlyrccorrmended.'
U -FCW: 1st Feb 84

THE LORDS OF TIME SAGA

/: LORDS Oh IIMh

Ourcongralulatior s to Sue Gazzard fa her super design
fcr this rew time travel adventure through the agss of
world history. Chill to inelce-ags. go romin' with Caesa 's
legions, shed light on the Da'k Ages. ex.

Price: £9.90 each (inclusive)

Level 9 adventures are available from good computer shops,
or mail-order from us at no extra charge. Please send o'de r ,
orSAz tor c&tal;>yue, l-J

LEVEL 9 COMPUTING

Dept Y 229 Hughenden Roac,

High Wycombe, Bucks HP1 3 SPG

Please describe your computer

fcT

3

s

3

3
3
3
3
3
3
3
3
3
3
3
3
3

3

^MSxsssisiEmisxsmxsgsmisssmmismmm

VOUR COM=UTFR, APRIL 1 084 207

FORAQUD(OR LESS) YOU CANSPEND

i'v3

208 YOUR COMPUTER, APRIL 1984

AWHOLE DAY ENJOYING YOURSELF!

ZX MICROFAIR has
become a household word for
anyone interested in d scovering
wha-'sthe latest gizmo for their SINCLAIR
computer!

A good day out at a reasonable price and an
enjoyable dav spent amongst friends and
fellow enthusiasts!

I et's fnne it what other exhibition gives you
so much for so little?
Where would you find under ore roof all the

latest hardware, software,

books, user groups, programming aids,

peripherals and add-ons for your

Sinclair Computer?

There's even a bring-cnd-buv sale, bars,

buffets and a place to relax afer a hard

days ooking!

So book you' place now by sending for an

advance ticket at reduced cost.

Bat don't forget the date: Al I Y PAI I Y

28th APRIL 1984.

See you there.

r

11™ ZX MICROFAIR.
ALLY PALLY APRIL 28™ 1984.

Saturday 28th April 1984 10am-6pm.
ALEXANDRA PAVILION, ALEXANDRA PARK, WOOD GREEN, LONDON N22.

SEND TODAY FOR REDUCED PRICE ADVANCE TICKETS!

Post to Mike Johnston, 71 Park Lane, Tottenham, London N17 OHG.

Please send me the following advance tickets for The ZX MICRCFAIR on
28"h April 1984:

"1

.Adult ticke's @ £1.00 each

Childrer (under 14) tickets © 50p each

i

X 3 LEASE ENCLOSE A STAMPED ADDRESSED ENVE-CPE AND
MAKE CHEQUES/POSTAL ORDERS PAYABLE TO ZX MICROFAIR.

Name

th

X

Address

U

PRICES AT THE DOOR ON THE DAY: ADULTS £1 .25 , KIDS 60p

11

ZX MlCROffiiR

ALEXANDRA PALACE !
APRIL 28TH 1984 '

YOUH COMPUTER. APRIL 1984 209

MANCHESTER

HOME COMPUTER

mm

AN EYE-OPENER FOR ALL THE FAMILY

[Visit the show tnat brings you up-to-date with today's
I technology. Whether ycu run your business, domestic

w

^ J

©

accounts, learn or play with your computer;
if yoi don't have one but want one; v/e
have all the hardware, the software, the
help and edvice you could ever need

If you live in "he North West don't miss t!

ffy

NEW CENTURY HALL corporation street Manchester

Opening hours Thurs & Fri 10-6 Sat 10-4. Adults £2.00 Children under 16 £1 .00

Computers
tarExpat

Vectrex

Aquarius
New Brain

Plus Printers, Disc Drives, Memory Expansion, Software

Quantity discounts available

No tax charge for equipment shipped abroad
Write for our price list or call our 24hr answer phone

01- 681 8785

GalasetLtd, 30 Bay-ford Rood,

Littlehampton, West Sussex,

England. Telex. 895401 8 AcuraiG

UIDE SPECTRUM

ninC ROFTWA RF

FIRST TAPE HIRE
26 PAGE CATALOGUE
NEV/SLETTER

OVER

250

DIFFERENT
ZX SPECTRUM
PROGRAMMES
AND OVER 2000 TAPES IN STOCK

ANY TWO TAPES ONLY £2.20 (int VAT A p&p)
FOR TWO WEEK'S HIRE

LIFE MEMBERSHIP ONLY £6.00

MANY POPULAR TAPES ALSO FOR SALE
_j AT DISCOUNT PRICES

JOIN NO W or send 3Cp stamps for catalogue

200 Mjlgrivo Road,
Cheam, Sure) SW2 6JT

l eiclcsc cheque for C6.0C tor LIFE MFMBFRSHIF and I understardthal
mylirel tape hire w II bo FnEC. I\ within ?0 days, I'm not teli^itetiwil'iyu ir
se-vice you'll refurd m/ membsrsrip fee.

Name

Acdress

1
I
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I
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*l

2 1 C YOUR COMPUTER. APRIL 1 9£W

1 r

BLOC

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ANIROG SOFTWARE LTD.,

Trade Enquiries:

29 WEST HILL DARTFORD KENT {0322} 92513/8

Mail Order:

8 HIGH STREET HORLEY SURREY

24 HOUP CREDIT CARD SALES HORLEY (02034) 6083

PAYMENT BY CHEQUE P.O. ACCESS/VISA

50p POST & PACKAGING

m W

:e pi

Fight your way to become
The Master of the Skies
travel through time to over-
come the enemies of the
past and future. Engage in
dog fights with the squad-
rons of world war one to
the fighters of the year 2084.
Five Screens of Breathtak-
ing Scenic Graphics.

J.S. £7.95

rr"i"rri~i"rt~i"ri"ri"i"i*i"i"r<"ri~rrrrri"rr<*t~ijlij~t~C , - , - , _ , _ l _L , _ l _ l _ l -.L | - , - | - , . , - , - | - , - | _ | j- , j_ , _ , j_ , . , _ , - , - , - , _ | J_ , _ | j_ , . , _'_ , _ , _ | _ |

Aterthe recent space shuttle flights the pupils of a -unior School were set tie
project - "Outer Soace". In the corrputer room J II, eged 9 and George, ageJ 10
were using an RD Digi:al "RACER on the BBC Micro to draw space monsters,
following the simpla commands for ins:anf drawing and coburfill. They then added
the animation nut ne, and imagine their excitement to see the monsters corne to
life and actually fly arcund the screen. The r teacher was impressed aid coiid see
a rea life application. So he suggested that instead of monsters they draw a
satellite ii orbit Usingthe special conduction routines Jill and George dd fiis n a

matter cl rrinLr.es.
Teacher later used their lively animated
sequence to illustrate c lesson on the
communication satellites orbrting earth; and
the class were amazed that the

sophisticated display was
created bv their pals - and not
NASA.

in******

l_l_l l_l_l_».

In the educational field the RD Digital "RACER
is capable uf vj;ry effective results in the most
inexperenced hands, and yet it is an inva uable
tool for the more advanced user.
Features of the TRACER indude:-

• Immediate repodiirtioi form original drawings, mar«
and books to cisplay fib (A4 on Spectnm. A3 oi BBC).

• Ssmpls and move text and user definec graphics
before entering to display.
Geometrical shapes quckly applied after sampling,
then copied and moved to any position.

• Fdil colour Till diid jtiauut; :f ; m.lrn-:i ■>. tKJS

• Instanl colour charge wth all available colOLrs, both
PPPER anc INK.

• ALtorrabc re- trace and variable scaling with animation
on BBC).

• Save nsplays on cassette cr prhler or merge win
youro»vn prog'ams.

• Uses all the BBC's grapucs modes, including TELETEXT .

• Sipplied ready to use with ull easy to inderstard
instructions and advanced software

Tor further detail: of the PD Dgita TRACER eitier telephone or
write to Dept. V C4 at the address below {SAE ptease). For prompt
delivery just send a iieque nade pgyabe to RD Laboratories Ltd,
blether «th you r name and address.

Also avcilabb frtm Spectum Stores, and Griffir & George.

RD Laboratories

Microelectronics Application

i i i i i i i i i i i i i i i i i i i i i i i i i i

'- 2C"Oaurt"R3ad"E5taie Cwnbran Gwert NF44lAS"

Cvrnbran: .06333) M333 Telex «7240

"C< • j_i_i

CDmPUTER Linhl yip tadc RApi< lip

IDC SOCKET CONNiCIOTS IDC 94R0JDED HEADERS LIGHT PEN V I Vpf I jT^l I M 1>W I 1 \0 II \ SgF |

2flw

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u«» - SOu

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26-*»Y U.H

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SO-MV £2.03

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hiuion caul:

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14-wiy
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30«jy
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FOR US£ WI1H ARV
ATARI T'PE
JOYSTICK

ONLr en. 75

lOUPUTFn IFAftS

7 Pin ON p'.tg to I * 3.5mm
A I - : !<T,JhcH-„jj 11.25

'» Pin CIN plig to ? x 3 Smm

.'. 1 x? Smm Jic» Plufl*

{2.20

8 Pw CIN pkia 1o 6 Pin DIM
pi. 9 it.QS

2 < 3.5mm Jack P>uti to
2i3.5nvnjKkPtitfst1.2S
7 Pin Ci V p-in to 5 Pii DIM
plifj T1.9S

J Pin CIM pk.rt. 1o 3 Pin DIM

plia & 2 Shim J»ck Pluq

(2.2G

J Pin UN pkig to 7 Pin DIN

plig 12.25

6 Pin OOMHO P ,.j lu E Pi'.
DOMINDp-jj 11.9E

DC SHROJD£D HHUEHb
«flTHEJECttN6
.0CK1NC ARMS

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£1(0
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11.40

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;r,-.1.i.,' h.;h ->m f.i.'
'-...-. IV- ■• v ■ f <I'AI TV

CNL\ C2*.95

OIL PLICS IH(I-*I«,F»I IOC

M Mp

16 fl.CO

».... fl40

10 CMS

IBCJUMl'lllb J)
SINCLE IVDtf

2 Hc«

•BC PRINTER LEAD

P.1ETR£ f 10 43

;METFIFS £11. 7S

OHAOJNCROflC 1
' METTIC £10.03

JMCTBES £11.75

[DG! COriMECTOR;

2»23«av:/H8ll C'.Bfi
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£2.10
j.6w»,'.'ic;n,r.i £1.20
DOUBLE SIDED PLUG
BOARDS

2X8123-wav C1.25

SPECTRUM 2«-™(, v £160

in
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£• ?0

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16 >5 £* Z5 £5 20

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It

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31"

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Jimpv Lo*d« Rliiwn 2«tjl«
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UcwtaK. .- .:'« I wdK
1190 C2 09 u 3
n 90 C2 11 £3.10
C.CO E2 2S £3.40

43 pin
J.ill

E2 23 t2 SI llCfl

3.2S
'a 30

CJS10M ASSEMBLERS JOTSTICKS IDC»-WA¥l>:0

ANY COMBINATION OP IDC
& IIBBCN CABLE MADE TO
ORDER

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ONLY 3*p EACH
bHnOCMiNC-plug 50p

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HIGH SPIED

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JOYSTICK

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Junta*' L**d RIiImwi
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35" leni DnuUli: Erscd

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i/XC TrtF»C: WlCKU

REHIHD AND REMOVE

VIC TAPE BACKUP is a new and unique machine-code
program which can provide security backup copies of most
VIC-20 programs currently evailobc.

• wll bECkua m3s( lypO> of pioytam, in BASIC or machine-code
t Detailed instri.cticns provided

• Vaty «asy to use. wltr audio-visufi prompting system

• No ris<s to original tapes

• Works with ;sl mernorv ccntiguraiions

• A Inwinrf' fni Innd im imi

• Expanded VIC may backup Comrrodore 64 programs

• Wrintn for RaaioWest, roted exiertin CBM'VIC progranming

Price £7.95 (includes VAT, post and packing — no extras)

Send orders win CheqLe/PO crossed 'j/c pays;' made out to Leve So't

ware Lid to the disfibutors:

LEVEL SOfTWAnE LTD. r.O. OOX 55, SI II FILLY. GOLIM JLL D90 4SL.

TEL 021-64} 6728

This i' -ii. i. mi <$ Milii a tictiy on LLincitic-i thai puichastrs uie ii only >o utte security

backup r.3|m? oi tSpO* winch limy own. lor thoif oat use.

I havfl fear) aid un HHIOB d InO condnonj anc agr«e toBOict by than.

Sgnature

NAWF:

AOCHESS:

YC4.84

2 12 YOUR COMPUTER. APRIL 1 E84

IfS THE
WOOLUF!

wfaWfk iiii Jm

Writ'en by: Marin Buller

TUBE WAY
ARMY

(Sjwgsao,

Written by: Rat-ibo* So ftware

From the aecrors of Halls of the Tiings,' "I nvasion cf Ihs body snctchas '

and many other software clossics came these exciting new games.

Games to tax your judgement ond puzzle and frjstrateyou for months on erd.

Don't forger Ol r o'hei titles, which have attracted enthusiastic reviews like

"Spectacular, one of he best ganes I 'vs seen". . . POPULAR COMPUTING WEEKLY anc

'Excellent, dangerously addictive, could chnigp. thftSpftrtrnmgnmf><; *<-orn? overnight'' . . . SINCLAIR JSER

HALLS Of THE
THINGS

Written by: Nbil Motteisheoc,

Sirron Grcittsl ond

. Martin Hcrsley

INVASION OF THE
BODY SN ATCHAS

Written by: Simon broltel

and Neil Morcrsticcj-J

Selected titles avoilaole from:- W/a

John Meruies

ZEUS
64

ASSEMBLER

HMV
WOOLWOKTH

other Icrge department stores and all good major
software retai ers. A'tenativel/, send the coupon to:-

ROMMELS
REVENGE

Written by : Martin Horsby

THE DUNGEON

MASTER

Written by: Crnhnm Stafford

All titles for

ASK Spectrum

unless

otherwise

stated

W'ittei by:
Graham Stafford

CRYSTAL COMKU IING, 2 ASHTON WAY,
EAST HERRINGTON, SUNDERLAND SR3 3RX.
TRADE ENQUIRIES WE LCOME:-Tel: 061-205 6603.

CRYSTAL COMPLHN3 IS THETRADING NAME OF CHASDRFX L"D.
fhe nomeG « a is used u^ei k-.^ v.-

PROGRAMMES I WRITER ANY SOFTWARE THAT COMES UP
TO OUR STANDARDS? 1= SO SEND1TTOUS FOR EVALUATION.
W: OFFER CENEROLS ROYALTIES.

p:,v:.-.,--., ,, ,-,ly ■ NVASION OF THE BODY SN ATCHAS Q £6.50

HALLS OF THE THINGSI I £7.50 THEDUNGEON MASTER Q £7.50
IT'STHEWOOLUF Q £6.50 ROMMELS REVENGE £6.50

TUBEWAYARMY D £7.50 ZEUSMJZC9.95

CATALOGUE OF LATEST SOFTWARE D

NAME

ADDRESS

I enclose cleque/p.o. for

P& F induced. Overseas orders, pease add £1.50 per item.

YC4

3

The ALPHACQM range of thermal printers are
compact, lightweight and quiet in operation.
No maintenance is required far the life of the
machine (i.e. no ribbons to chanje).
Uses inexpensive 40 column thermal paper,each
roll 25 metres in length,

Rlphacom 42

For CO MM DO HE 20/64, ATA Rl{all models),
BBC CENTRONICS, DRAGON and RS232.

A high speed, 2 lines per second, 40 C3lumn
thermal printer, which has full 320 x n dot
graphic capability. To the printe', simply plug
in the interface rrod jle which is applicable to
your computer. Each module supplied includes
the appropriate self test programme. Other
interface modules are available separately.

1 CLEPP PtPSQ- BF M
- .2 2: EEcP ,1.3: 4m

T 3:7; "PSSST IS

LO*

Pf |

41 2[2*| KI J
1

1 M !

S

i II 1

Mil

•-5

i

*{ »
A] A

i

i

!

j

1
i

I
1

1-

'ft

2

*

♦

I '

Please send me printers at £61.95 for Spectr jm or ZX 81 only.

Please seni me printP.rtmt P104.95 fnr: OCnmnodoro 20/54, Q Atari,

D Dragon. DBBC. O Standard RS232, and Doxes of paper at £12 pe-

box of 10 roi s. TO~AL £ Cheque'PO enclosed or debit mv

Ac:ess/Barclav card account No. -

Nanne8i Addtess ...... »

ij U i= L' Pi : "i :~ s? ^

3051 LET r=y; GO SUB 3532

<!'-' PT 10,17: "B38 »c* |f

■305

Rlphacom 32

For SINCLAIR SPECTRUM and ZX 81.

Fully interfaced to the Spectrum and ZX81 ,
ths printer operates at 2 lines per second, with
fu I 25fi y n rlnt graphic capability, 32 column
line width. It uses the standard Sinclair print
commands (COPY, LLIST, LPRINT).

Available direct or forr W H Smith, Laskeys,
G-eens, John Menzies and Spectrum Group.

DEAN ELECTRONICS LIMITED

Rlfinriale Park Fembank Road Atcot Berkshi'o
Telephone 0344 885661 Telex 849242

214 YOUR UOMPUTER, APRIL 1984

LUNA CRABS
By M.J. ESTCOURT

HAUNTED HEDf

By DERBK BRp/VS

I

■eath ghase-..

. ly M.J. ESTCOURT •
Kempfetoft cfoysttek Goniparttye

mEGfi

PRISM 01 253 22 7«^
WEBSTERS SOFTWAR&.Q4S
LIGHTNING RECORDS AN£|
M CRO DEALfcPWK~ST a4

mmmmESft

Icitf-T"!]

For any Spectrum

ALLTITLESW.i&INCVAI.
SELECTED M CROMEGA PRODUCTS
THROUGH: BOOTS, GREENS, ASDA,
JOHN VI bNZIbS. LASKY5, WIG FALLS,
RUMBELOWS, HMV SELFRIDGES.
WH SMITHS, SPECTRUM SHOPS
bVLHYWHfcHt AND ALL OTHER GOOD
SOFTWARE STOCKISTS

Trade Enquires

;rek brew:

Kemoston vOVStich Compatible

1 r

" itfltHJIIl-lW'l

l»J fWVW J I r* I •*.•»!• J 1 1 1 •!» I l»i M "M t'i f») l»J ■ ■>«■ I

» i * •?!■ t:r»aw* i m vi

Software Ltd 230 Lavender Hill London SW 11 1LE

Success Breeds Success

Sponsored by

Practical Computing
Your Computer
Micro Business

National Exhibition Centre, Birmingham. May 4-7, 1984.

After one show the Midland Computer Fair
has already established itself as an outright winner.
Mot only is it the leading exhibition in the Midlands
:br microcomputers and related products, but it
stands in its own right as a major national event.

In recognition of this, and the need to
accommodate thousands of expected visiters the
venue for :he 1 984 Midland Computer Fair is to be
Britain's premier showcase - the National
Exhibition Centre, Birmingham. The NEC with its
superb facilities for exhibitors and visitors alike will

be the fitting site for this major event which
attracted over 1 7,000 people for the first shuw.

Whether you are interested in microcomputer
enthusiasts or would prefer to take space in the
Eusiness Section to meet small business micro-
users, the Midland Computer Fair is definitely for you.

So why not le* a little of the Midland Computer
Fail's success rub off on your company by
reserving a stand at the next show.

The road tc success starts by filling in the
coupon below;

^Midland .

(gmputer
fair

Persona? computers
Home computing

Small business systems

Return to the: Exhibition Manager, Reed Exhibitions,
Surrey House, 1 ThrowlevWay, Sutton, Surrey SMI 4QQ
Tel: 01 643 8040 Telex: 946564 BISFRS.G

Position _
Company
Address

3 NEW MASTERS' PIECES

The masters oroudly announce their latest three master-
pieces. From the zany humour of our two CBM 64
games to the 'Arcade Simulation' excel ence of our latest
Spectrum launch, everyone will be a collec:or's item.

x&mB83&8

BUG SQUAD

Zany arcade action as you, the Puffing Spray Gun, take
on the garden's b>L.gs. But you have to contend with
Mutant Lawnmowers, Manic Magnets, and even the
occasional flypass of a bottle of Essence-of-Spinach! ■_,
Fabulous fun for all ages, great graphics and a lovely^
sound track. For the CBM 64, only £7.95. Jr

STARBLITZ

Here is the first ever truly 'Arcade Perfect game for the
ZX Spectrum. Barely launched and it has already
become the shoot-em-up game that every Vid Kid is
ta king about. It's netted our greatest pre-launch orders
ever. Cheap at only £6.95.

QUAK ATTAK

Yet mere zany humour as yot, the Feckless Hero, take
on the Foes on their Flying Ducks. Fabulous action set
^ against the background of a medieval castle, and
^^some very fine graphics indeed! A sure-fire hit
^V for the CBM 64, at only £7.95.

3

-?«& Ilk ...

TARBLM

^csmisi

:5sk*

I L-

W\

UGH!

UGH!

Launched last autumn to rapturous applause
and 'ated the best ever game for the Dragon 32,
UG H ! has already become a legend with massive
demand for both the Dragon/Tandy Color version and
our recently launcned CBM 64 version. Soon on the
48K Spectrun, and many UGH! surprises in store!
Dragon £6.95, CBM 64 £7.95.

MICROBOT

One of the few classics for a ^-BK Soectrum featuring

high resolution, detailed and animated graphics of a

quality matched by few and bettered by
none. Micrabot has been an overnight success
as one of the bes: and most original games for
the Spectrum ever, only £5.95.
ZOIDS

Rated the best shoot-em-up game for the CBM 64
presently available. This best-selling all-action game
features 'Arcade Quality' play, super smooth high
resuluiiori graphics, and al to the accompaiimert
of a Bach fugue! A fast mover, just £7.95.

All CBM 64 products soon available on disc - please contact us for details.

ALREADY CLIMBING THE CHARTS

Softek's Software is available at most major outlets, including selected branches of the fo lowing: W.H.Smith, Boots, Dixcns, Tandy Healers.

Lightning Dealers & Selfridges as well as through our nationwide dealer network. Meil Order Address: Softek International Ltd., Softek House,

Tranquil Passage, London SE3 OBJ. Dealers' Contact: EMI Distribution or Caroline Shepherd on 01-318 5424.

German Dcolcs' Cortact: H.Hagemain 0211-276953. Wail Order: Duchandlung Myer, 34/3G Maiki, 4470 Mep|wn, Ens.

SOFTEK INTERNATIONAL LTD., 12/13 Henrietta Street, Cowent Garden, London V/C2E 8LK Telephone D1-240 1422

Soltek's Sohwa'e i> sold strictly according to our terms and conditions of trading - copies of which are ava lable on reqtest.

T

it' a*

m

mk

PRINTERS

■

■HI

9

■^■^H

Seikosha GP100A

Silver Reed EX500

Parallel

Silver Reed EXSOO

Serial

Silver Reed EX550

Paraiel

Silver Reed EXSSO

Serial

Epson RXfiO

Epson FX80

Epson KX60 (F/T)

Epson MX10C(B2 Col) .
Epson FX1O0

238.05

343.85

378.35

534.15

569.25
320.BS
503.70
366.85
546.25
68439

MODEL A £259

MODEL B £399

MODEL B with ECONET £446
MODEL B with DOS .... £469
Model B with DOS & ECONET
£516

Whether its your first computer or whether you're already an
enthusiast, LVL COMPUTERTOWN offers you the quality of
service you expect from experts. If you invest money, you go to
a bank or a broker - a specialist who can guide and advise you
on the best return for your capital. At LVL COMPUTERTOWN
we're specialists too. We're there to help guide you through
the micro maze, keep you up to date on innovations, help you
get the best value for money, whether your computer is for
you, your children or your business. Your computer can change
your life - make sure you change it for the better:
Come and talk to the experts and move into micros with LVL
COMPUTERTOWN

COLOUR UGHTPEN

A

*

The lightpen is compact, reliahlp
and comes in a rugged metal case
providing physical and electronic
protection, its sensitivity can be
adjusted to match any make of TV
screen, giving the highest levels of
accuracy.

The lightpen package consists of
trie lightpen, an interface unit,
introductory software on cassette
and a user guide

ll

J

£45.95 1

MONITORS

SABA l4 " COLOUR MONITOR/

COLOUR TV.

£274.45 Is

MKR0VITEC

14" Colour Monitor
£247.25

14" Colour Monitor
£247.25

■

® SANYO

r 12" Green Screen

£102.35

CASSETTE
RECORDERS

oLs Ov«J\)

SpFLECTOft

TheBeU&Howell/LVL

Computer Compatible Data

Recorder

O Automatic Level Control

O Automatic Tape Stop

O Tape Counter

O Remote Motor Control

£734.83

' IT'S A PORTABLE
COMPUTER TERMINAL!
* IT'S A LETTER QUALITY
^ COMPUTER PRINTER
* IT'S A FULL FEATURE
ELECTRONIC
TYPEWRITER

Crtl mUfflOC ADVENTURES
&\Ju VUpUVE PhJosophers Quest

Castle of Riddles . . .
DESIGNED FOR THE BBC Countdown to Doom
MICROCOMPUTER SpWm Adventure ..

LANGUAGES

LISP

FORTH

GAMES

Monsters

Snapper

Planetoid

Arcade Action

Rocket Raid

Meteor*

Arcadians

Slidmg-31ock Puzzle

Cube Master

Starship Command . .

Snooker

Super Ir.vaders

Hopper

Colditz

Doctor Who

White Knight II ...
Missile Rase ...
Draughts & Reversi

GENERAL

. £16.85 DeskDUiy

£16 85 Creative Graphics .

Graphs & Charts

£9.99 ToQl Box

£9 95 Record Keeper

£&SB Magic Garden

. £11.90

£993 EDUCATIONAL

. . £9.93 Map Rtofwienyes .....

. . £9.95 Lasemaths

. . £9.95 Classnaster

. . £9.95 Algebraic Manipulation .

. . £9.95 Word Sequencing

. . £9.95 Missing Signs

. . £9.95 Number Balance

.. £9.95 WordHuat

. . £9.95 Density Circuit

£10.00 Chemical Analysis

£10.00 Chemical Structures

£9.95 Jars

. £9.9S Vu-Type

BBC

The Computer Book . . . £5.75

The Book of Listings . . . £3.75

30hr. Basic .... £3.95

Beyond Basic £7.23

GENERAL '^ ie Friendly Computer . £4.50

Programing for the BBC . £8.95 Sound & Gra P hics £795

Advanced User Guide. £12.95

ACORN

Creative Graphics
Graphs and Charts

Forth Book

Lisp Book

View Guide

Into View

BCFL User Manual

. . . £7.50
. . . £7.50
. . . £7.50
. . . £7.50
. . . £2.60
. . . £2.50
. . £13.00

The items featured represent a very small selection
from our vast product range.

Further information of both product and services
available can be obtained by telephoning or visiting
your nearest LVL Computertown Dealer.

C-TECH SOFTWARE
184. Market St
HYDE

Chuhu?

oaiaesezzj
• computer cm

76. Victoria fid

WTONES
Cheshire
OS] 4203333
OAJXEAF COMPUTERS
100 Boughloci

CHESTER

024t 310099

THE COMPUTER SHOP
56/38 Lowthsr St

CARLISLE

Ci.r-.br. a
022127710

ACL

I. NartruruJJ
GRAYS. ESSEX

0373 79S34
BRCADWAY MUSIC
AND VISION

Wofrdfoid Green

ESSEX

01 504 750O

, LOMAX

-RSEYSIDE WARWICKS

m

THDRNCUAKD
46. Peraby Rd.
HI 5 WALL

The Wirral.

ey»ide
3417516

RUGBY

Warwiekiture

07B8 6S2-S

WEST MIDLANDS

STER

. £9,95
. £9.95
. £9.95
. £9.95

. £9.93
. 19.95
. £9.95

£21.00

£13.80

£9.95

£7.30

£7.50

£20.03

. . £9.95

. £11.93

. £11.90

. £11.90

. £11.90

. £11.90

. £13.80

. £13.80

. £11.90

£16.10

St Annes Squire
MANCHESTER

361 832 »1€7

WORC

SPUFTREE COMPUTINC

LTD

^ouicU BuddUKjs.

Pern* Street.

rENBWRY WELLS,

Worcestershire

35848 1 13S3/81 1304

YOUR
LOCAL

BASIC «US. SYS.
Trent B>ulev*rd
WEST BRIDGFORD

No:tirgh»rr

0602 819713

S F ELECTRONICS
4B. Luibv Rd.
HBCKNALL
Not*

0603 6+0377

LEASAUNKVIEWDArA Ud
230. Derby Rd.

STAPLEFORD

Nun j

06C2 3£8484

ABSOLUTE SOUWU
AMD VDEO (Oxford i Ud
19. Old HighSf. Headatgton
OXFORD
"65 6-

K ft % COMPUTERS
32, Alfred St mi
WESTON
StTPERMARE

Avon

0934 41932*

CO'-STON COMPUTER
CENTRE LTD
The ColitonCenire
ll.Colaon Ave.
BRISTOL
0272 27661*

UCHARDMOSRJS
)23, Beariwocd Rd.
SmettiwicV

WARLEY

021 429 1161

|8C MCBO SERVICES

200 Eailsdon Ave.

Nth, Eaibdon

COVENTRY

020: 73813

nfcttliaal

ATLTSHIIE MICRO

CENTRE

Unit 4.

Central Ttading Estate.

Signil Way,
Old Towr.
SWINDON

0793 612299

10- VU ELECnONlCS
38. Church St. Woiverton
MILTON KEYNES

Jediord
0908312108

r

EETiiPSOBS
20. St, Oneii 3: .

HEREFORD
0432273«B0

KENT MICRO
37 Union Si
MAIDSTONE

<cnl

3622 52734

GRAVENSENl)

COMPUTERS

39. The Tenac*.

GRAVE SEND

04T4 506"7

ALL PRICES
INCLUDE ^|
VAT.

MA ELECTRICAL
7. Hiqh Si
IRLINCBORO
M'Hants
•3933 650133

iwafaw:

CY LORD S. SCN
63 Blabv K.i

wioaroN

Leicester

I333T65033

LINCOLNSHIRE

* OAKLEAT COMPUTERS

121 Dudley Rt
r GRANTHAM

l'476 "OJHI

CANHON1URT RADIO
18S Uppei St

ISLINGTON N!

:.TnHfin

01 226 9392

PAUL ELECTR1CA1

ISC J. Grind Dnvp

LONDON SW20

01 S42 6546
WOODS RADIO

257. Laverder Hill
Baltenea.
LONDON
ut fa nm

MEDUCCTTBROS
S3 Haldol

SHREWSBURY

Shropshue
0743 30(0

S I EMEJY ft CO
10. Market v j. ,-
BUNCAY.
SuHoUt
098121*']

EVERYMAN COMPUTER

SERVICES

HALLYMONEV

Co- Antrim

N -_> .- ■

026 >6 626S8
NrvntLTtH

ELECTRONICS

BALLYCARRY

Co -Antrjn.

09603 76330

I W BACH ALL
IB Salter St .
STAFFORD

0785 34^0

HH1ANM

City Rd Fenion
STOKE ON TRENT

078*415787

. COMPUTERAMA

59 Forec,ate Si

STAFFORD

HASLEMERE COMPS
!5. Junction Plice.
OASLEMEtE
Surrey

042833650

? ft H ELECTRONICS

3, The Parade
leading Eoad
i-ATE

Surrey

02S2 - 877 22:
• Spectrum Members

CfE MICROS
78. Brighton Rd.
WORTHING

Wen Sussex

09O3 2 1 390C

ISLE OF WIGHT

Erxcru.

t. Forelvd Rd
BEMBUDCE

kle of Wght
098 ;B7 2578

DEALER

38A W.t.r Si

ACCBINCTON

LMCt
32S4 3*521

, Hore & Bu»ine»
Conputars Ltd.
S4.York*tun Street.
OLDHAM
361633 1603
Home ft B js n«r
Co.nputett (RCR) Ud
.'J Torltarurs Street,

ROCHDALE

0706 344654

BUCON

IS. Ma/atl U

SWANSEA
0792 4E7980

SU ,

91. Whitchurch fd.

Cvicoei

CARDIFF

Wiles

02S2 621813

THE COMPUTER SHOP
4 J . The Hayed.
CARDIFF,
WfjM.

022: 26666

COMMSCOT
30 Cord>n St
GLASGOW

04 1 226 487S

NEVVTONS
Man St.
SEAHODSES

■3665 720307

^Si

■■HP

i

I

I

^-w. r, i n rv/josg?

SV£3|g|

-- 7,; : ,--.,

wr* i;\ ..Ld —ii .11a n> ~is

DC

t-L.' fj4^ hik no sb i • o.«j or an

i«!ii' w>- tns^ 3* nm *;* ts»

■dw

' T^*^>"T^-' ■ •"*.' '

Choosing a home computer is a bit like
playing a video game. The more you play, tie
better you get. So you'd expect people who
spend I heir working life choosing computers
to be pretty good at the game. Quick to shoot
down a fault. Pleased when they find an
improvement.

Recently Which Micro? and What Micro?
tested the Spectravideo SV 318. Here's what
they had to say

"Every home computer coning on the
markettends to bo hailed as revolutionary,
For once this really has to be true with the
SpeC'rovideoSV3l8."

"The first cheap, high performance
computer..."

"Double precision numbers ... are ideal
for companies with turnovers under
£999,999,999,999.99."

Spectravideo SV 318: Memory - 32K ROM exDandableto 96K, 32K RAM expandable to 1MK: Keyboard - calculator type, 71 keys,
1C function keys, builtin joystick/cursorcontrol: Graphics- lGco!ours,25Gxl92highresolijtiongraphic$, 32 sprites. Sound - 3chcnnels,
8 octaves perchannel: CP/M" compatibility- over3000 existing software packages: Storage- cas3etted'ive,2e*6Kdiscdrivecapacity:
Siggested retail price - £186.

Spectravideo SV 328: Memory - 32K ROM expandable to 96K, 80K RAM expandable to 144K: Keyboard - full word processor type,
87kevsJOfunctionk€ys / builtincursorcontrol: Graphics-16coburs,256>(192highresoIuNorigraphics f 32sprifes:Souricl-3channels,

8 octaves perchannel: CP/M* compatibility- over3000existingscffwarepaDkoge3: Storage- cassertedrive.256Kdiscd[ivecapacity:
Suggested retail price - £262.

A full 'ange of peripherals are also available.

••VWicl»M*«Mri!!Wi»IW«.« -St»svac«>sv-3I8 . *®CPWsOf^i-:f(i«irrafctri:)(a!Dyl:jlte*cir-ti:

ass* --~-a3oasKi

£H9 ■ m

'■•;■;■:.■

HI

HSnk

ore 64

B|EM

■HP

sasSf*!

Which Micro? Dec 83.

**

". . . c far better job with its keyboard than
anybody else using soft keys."

■*; . most people will notice how easy it is
to produce graphics with the Basic."

"This is a BBC class machine."

"As a computer for the enthusiast it is we I
nigh perfect."

"A good micro fortomorrow"

Obviously, they had more to say And we
think you should have a look at the reports for
yourself to prove that we haven't exaggerated
their independent opinions.

Rll in the coupon today and we'll mail
you the reports as well as a full technical
specification brochure in colour of this
amazing new personal computer or see the
Spectravideo for yourself at most leading
computer stockists.

^REIRRMOE27m

SV-318 SV-328

PERSONAL COMPJTERS

Spect-avideo Ltd, 165 Garth Road, Morden, Surre/ SM4 ^LM
Telephone: 01-2300101. Tslex: 28704 MVIH VANG

r

fo: Spectravideo Ltd, 165 Garth Road Morten, Surrey SM4 4LM

! am interested h Spect'avideo computers and peripherals. Please
send me the latest repors together with i fu I technical spedficotior

brochure.

Name. .

Address:.

TBI. NO.:

.STCCorJe:.

VC4.'S4

i

\

PAINTBOX s a must for ever/ 48K
SPECTRUM owner! If voj wantlo exp oif
the full graphics capability of voir
machine you con do so . . simply ard
easily with PAiNTROX

Fake a ook at the screen prints shown
above. Thsy ore Ihe sort of thirg ysu could
produce on your SPECTRUM.
PA NTBOX gives /ou an entire suile of
graphics urograrnrnng ales ir one
integrated pruyium. Fm inslunce:

UDG EDITOR

The fnrility tn Ififines inr re-define up to
84 grcphics characfers for your programs
or for use in screen-planning.

UDG DRAWING BOARD

A fully-integrated UD3 planner for
defininq up to 4 3anks of choractsrs.
Planning facilities include VIIRROR,
INVERSE, RO'ATE, FILE.

SKETCHPAD

An exp3rirnen!atbn "window" for
developing the UDG set

PRECISION PLOTTER

An anazing y versatile high resolution
drawing board which includes PAPER
chobe INK choice PLOT DRAW, CIR3LE,
FILL, AR2, OVER, ERASE, and STORE!

SCREEN PLANNER

Combininq PRECISION PLOTTER and
UDG characters! A multipurpose graphics
facil ty to enable you to produce incredible
srirfwn grnphirs All work can be sent to a
Printer end SAVED as SCREEN or as CODE
with its own built-in rrachine code 'ounne
for instant reccll from BASIC.

T(-e program ccmes with 3 DEMO
program and a 28 page book trat's
packed with hints and tips on how lo gel
Ihe best from FAINTBOX.

PAINTBOX is ideally suited for use with
the Print' n' Ploler Spectrum Jotter
Package -the first and best grcphics
planing pad for the Spectrum! So why
not place an order today' Write, call, or
sseyour local dealer

016607231

24 HOUR CREDIT CARD ORDERING

Po>1to DeptY Prinl'n'RoltflrPrcdicsUd.,
19 Ho oub i High Street London 3E1 9SF
Pleose send ire:

. .. PAINTBOX" SOFTWARE® £7 50 (4-75pp-p
old £8.25)
.. SPECTRUM JOTTE? PADS <jf £j 50 $1. 50 p+p

Olol£9)
. . SPECTRUM KEYBOARD OVERLAS £2 60

'nSrr , -itnbl<r.?9?i>
.. )> ROLLS « POINTER PAPER ^EIL^CSSppvp
•OfOl £12.50)
Q I enclose mmitlnnm in lull
□ Pease bill my Acc€SS.''6arcbycoraA'lso/
Mnslercati No

Overseas order; please odd 25% for cdditional
surface mail role.

mME

A3DRESS.

DEALERS: PhuneOl 433 6644 for enquiries.

This month's
Practical Computing guides
you through the exploding

bit mark

/

'&&*£
*&***

**%k

With April's issue of Practical Computing we've got the most detailed guide yet to 16 hi
micros. Our tree 48 page supplement covers over 80 machines.

There's also a review of the Transportable Computer of the Year, the Kavpro. A special 15
page guide en operating systems Advice on how computing can improve your health. And
your Inqt chance to wiri a Research Machines outfit worth over £2003. Dl*fir#iml

And lots mere rrUlIILUI

All in April's dynamite edition o 1 Practical Conputng, out new, LOfflDUIHIQ

uecmciL-eiccTRONtc putsi BtlUOrh.ltthOniG

YOUR COMPUTER, APRL 1384 ?23

THE REVOLUTION

A new and

incredible

extension

to basic

that lets you write fast moving

Arcade games

BY RICHARD TAYLOR

^fifth has the following N
NEW Commands & functions

All, Attr, Break Key Disable, Colours,
Column, Current, Direction, Disable,
Enable, Erase, Fill, Find, Get,
Interact, Intparam, Jumps, Large,
Let, Limit, Line, LMTPARAM. Mask,
More, No, Object, Print, Put,
Replace, Remove, Screen, Sound,
Speed, Status, Temps, Use, Vector,
Velocity.

/•

* Personal Computer News
said:

"Fifth provides an excellent set of
commands for programming arcade
type games and makes it easy for
you to write fast moving games in
Basic."

The packages come with an
extensive manual, a demonstration
program and the fifth interpreter.
The commands are entered as
words into your program and give
you INTERRUPT, driven, fast, high
resolution SPRITE graphics without
losing the simplicity cf Basic.

224 YOL.R COMPUTER. APRIL ' 984

buv fifth andggt a
City BomberFREE!

Just TYPE in this program by
Richard Taylor with your Fifth
Interpreter.

2 rn.fi «

3 REM *

eu-iuLH

By RICHARD TAYLOR *
* Hen » & CHL. sePieibtr 'B3 J

3 REM tHttttrifiKUffftftfi

6 REM

10 rrnddmize 1000

SO RftNDDMize L'SR B1O30

^W HHNDJMJZC : BORDER B

40 ODER © I-4UERSE 9: FLASH

SO BPICHT 8: INK 8: PROER 7

SO CLS

'0 GO SJB 9030

90 LET 1i=0: LET 1=1: _ET SCOT
£. =0

100 CLS : PRI^IT " MI:"; Hi; TAB
20.: "SCORE: ";3CDfe

11B PUH 0,163: DRRU 355,0

1PP LET 3=4003. RE.1 LIMIT a

138 LET a =6003. RE1 INTERACT B

14.0 GO SJB 3020

150 LET X=e _ET y=Sft: SEM MOUE

P L 3"l€ X j

160 LEt'k=2SS: LET • =30: fltfl MO

•■ 'C ETeay.x.a

170 GO SJB 2030: GD TO 178

I<SiJ0 LET 3=0: ~ET b = 176

IVIO REM iOVE Pl*nt:,d,b\ENABLE P

I one

1B20 REM ULL BOB^MjyE Bout . a,b

1«30 REM -NP6L5 BO»t>

1040 REM :10LE Enimv.a , bsENftBLE E

fictg

1CSB LIS

XCoO FCR a =£ lO 7

10 70 PFINT FAPER a, : HEM PILL

Ieae beep . i, »*k npvt *
090 PPUSi 25. FOR 3=60 TO 5TF
P -1. EEtP .0BS,J ME>T a
1.100 FCR C = B TO 1000 STEP £0
1110 LET s=10: LET t>=3: LET d=S0
1128 REM 30LNO a.b.c.n
1130 NEXT C

1140 LET S*3"5COPE. " «-STR> Score
1350 LET X=B: LET y »50 : LET t =3 :

LET m =3
1160 RFM TFCRS^IORGE
1170 IF Hi>ECO-e THEN GO TO 1200
1180 LET Hi=SC«r«: LET ajfta-'A yct»

HIGH SCORE ■'
1190 LET X=C0: LET 11=100: LET t =
2: I FT u =1
<VGE
1300 PRINT »0; FLASH i, " A

New Level? fy/nJ

1210 IF IWKEY$<>' '

ie

12<i0 IF IWKEr'Ax fl '

THEN GO TO 1580
1230 IF ZNKCVSO'U"
"Y" THEN CO TO 1220
1^4.1* TNPIIT "Np* LOVtL'/ ";L«v«l

1250 IF Level (0 cr Leveli? OR Le-
vel. (»INT Level ThEN GC TO 124.0
1268 GO TO 90
1500 INPUT INKEY1: PRINT BO, FLP

-^H \, ." another Cane 7 lynl

1510 IF INKfcYSS > "" THEN CO TO 15

10

JLS20 IF IMKEY »«"y" OR INKEV*»'Y"

THEM LET SCOrc-C: LET S-X: CO 1 T
3 100
1S30 IF IMKEY * '. > "ft " AND INKCYfO

N" _ HEN 00 TO 1520
1540 LET a*="OK": LET w =16 : LET
I -22

1550 CLS

1S60 LET Jt=0: LET y =0 : REM TEMPS
\ LARGE
1570 LET a =21 : LET b=31. REH SET

1500 FOR' a =0 TO 21 LET baa*. 687

1 590 REM PUT a,b,a$

1500 PAUSE 5. NEXT i

leiO LET J-INT CRNOtOJ . rflPCR a

BORDER a CLS : BEEP 1,-10
1520 GO TO 1610

2000 LET a*=INKEY*: IF a* = "" THE
N RE-URN

_!i3i.Q if- oj.'C" THEN LET * =y -m- (L
evt I i2> : LET imie -score-2
2020 IF a* = "7-' THEN LET y=y-l-(L

evel;2J: let st o re =scorc ■ 16

50: LET «=300: LET t =

print ink I; i pen la
>H 1, " P

THEN CO TO 12
OR INKE¥S= N

PhD INhLije

NEXT c

■0 50

2025 PRINT RT 0,23; SCO " e ; "
attSOTfl If y <28 THEN LET y=20
2032 IF yjl6a THEN LET y=168

2035 RErl fOUE F I ar>e , COLUMN Plane
,V

§040 IF tt*<>'"0" THEN RETURN
850 REH USE Boa b , Z
£060 LE~ Z=zH; IF Z =4- THEN LET

2870 REH LET a=LINE Plane\LET h-
COLUMN Plane\LFT f =1 INF Brmli
20?S IF Col^S THEN RETURN
2880 LE* a = a+10; LET C = ( INT <<C +

4 I ,-8J .1 -32KC -250J1 REM MOUE BO»b
/ b 1

. •i/iUk* j,i - I liJIJ

J0O0 FOR a=2 TO 31: LET b=IHT IR
ND*10)+1: IF RNO.B THEN GO TO 3

040

3010 LE <J=IWT IRNDaSJ i FOR C=21

TO 21 b STEP -1
3020 PRINT fl~ C,a. INK d; BRIGHT

RND; "0" . BEEP ,BBb,C*25
J0C*0 P?5lNT fl' c,a, INK d,
3040 NEXT a : RETURN
U.0k»« RFM 1 HTPRROM
4 010 IF ht:"f>Une" THEM GO

00

401S IF h»="tn«ny " TMEI4 GO t O 45

00

Att^H I F* rt = 17ft- RFM ( F - BiCUDREN

T h»*.USE K»,h\HOUE h* , COLUMM h*,

i'sENPBLE h$\USE h*,p

4.030 CONTINUE

4-500 REM LET o LINE enemy

45IB l.F~ o=f»*ll*TNT (R(jr>»ftl TF

C>«150 T HEN LET 0=150
4.52B IF <28 THEN LET «s20
4530 LE - poa55: REM MOUE enemy, P
,0\ENfl8L£ enemy

IP4*I rftMTTWIIF

50^8 REH LET ONLINE Plane

5010 LE" P=0 LET y=y*-4. IF y> = l

3S THEN GO TO 5500

5020 REH HOl'E PI an e ,f> , y \ ENABLE P

£030 LE" SCOf*=SC»re-l PRINT HT

0. 26; Score; "
5048 BEEP .005,60 CONTINUE
55*0 LE - aitl'6: LET b=0: REM MOU
r> Punp.h,j\Fkimi F Plane
5510 HEM MOUE Ene fty , b , a \ENABLE E
r '*l»y

5520 REM ALL Boap-.MGUE &0" b . b . a ■
ENftBLE BOHt-

S53B POKE 2 3fi81,a C1.S
35*0 LE - a* = 'YOU MAUE LANDEt>"
SSS0 LE' »=»2 LeT t*\; LET x=8.
LET y-8

3560 PRINT INK 2, REM LRRGE
S57B LE* Score -Scere+200
S5P0 GO TO 1000
•J13B0 REM INTPflRflH

6010 IF h*="boe>b" OR it = "bonb" T
HEN GO TO 7080
iii»e«> xf K*-"p i one ■■ en ;*-"p.ane"

THEN POKE 23661 f GO TO 1000
6030 LE" P^2S5 LET C=b0: REM MO
UC ene ay , p , o-.Enhble enemy
£>040 CONTINUE
7000 IF hi-"«im»y" OR % f ■**enc«y*

THEN GO TO '588
7005 IF is="ho»b' ThEN LET h=i
7018 LE" D=.176: REM LET p = CL1RREN
T SOMb\USE Bo»b,h\LET <l=LINE BOB
f, terr r -cocumh BoabsMQl'E Boa b- , CO
LUMN B0«b,0\ENABLE BO»b\USE Bomb
,P

7020 LE ' q=INT (q/S>. LET r - INT
1 r ,'8) : IF r^31 THtN LET r =3 1
'I3S5 JF l.'Cl TflCH LCT i-£l
7038 LE" p=q*INT (RND*S)+1 IF p
>21 THEN LET P =21

7035 FOR o=q TO 18 STEP -1: PRIM
T AT D,r-1+ fr ■©) ; " "; R _ o.r." ".;

AT o.rtl U-311;" ■■ : BEEP . n i .. ■■- ■

30: HEX - O

7040 FOR Ob<\ TO P FRItrr AT o , r -

ltir«0J." '^at o,r;" '".AT o,rtl-

Cr=31l;" ": BEEP .81,0138. UEXT
6

70 70 LE" Scure>SCDre+e-(LevcU2J
: print AT 8. 26; score;-

.'080 CONTINUE

7500 LE* 0-SB. HfcM MOl'E Ene ay, CO

LUHN LntBj , o . CiHOlC Ciifwy

7SI0 IF h»="bo«»b" THEN LET : =h

7S20 REM LET p =CURRENT BON b\ USE

BoubslsMOUE Bomb, COLUMN Bcnnb.o-. F

NABLE BombsU&E BOSb,p

7j3B COffTIMUe

d0S0 LET a$* "BOMBER": LET X «B
B010 LET" y =0 LET t «2 . LET ¥ =5
B028 PRINT PAPER S, BRIGHT 1; "

Available from Boots. Menzies, selected
branches of HMV, Selfridges and all good
computer shops, or from CRL, CRL House. 9 Kings
Yard, Carpenters Rd. London E15 2HD. Dealers
enquires welcome.

Jkl..O

REM L

10*8

PLOT

58B0

LET a

3060

LET X

3070

LET t

3080

REM T

JOBS

PLOT

31C0

DRP.U

31 10

PRP.U

512:01

LET w

J 130

LET y

PRINT

SliB

31S8

LET t

:»lf50

LET X

3170

LET J

9100

PRINT

3.100

PQJNT

1 eown"

3200

PRINT

t LP

3210

PRINT

,-■ a kral"

3220

PRINT

l ear

■ ' .J '.

^RGE

J.lbO. tllH.) Jl.b,«

5-' 3 Gftma using'
«0. LET y=2S
= 1. LET w*2
£MPS\-APGE

3, b ynru ;be,o
8,175: ERAg -255,0
», 175: LET t =3
=6 : LET X =3
=35. -£T a» = ' FIFTH"

INK 2; : REM LRRGE
=2: LET W=l
=55: _ETF y»&6
*«'By RICHARD TRYLOR"
INK 1; : REM LAHGE
OT 11.0; "<■', c tc »ov

AT lt,E,"«e5. 7 tc lov

AT 15,8, "Kei tc d'O

RT 13,2; •■ Vou must c
•» to";AT 13,3. "lard on

3.JJ0 LET a =3: REM OBJECT So* b , a

J24B LET a-» (1EM OBJECT Plane, o

3250 REM 03UECT Enemj,c

3260 REM P3INT SOUb,.

3278 REM P3INT =lane,»»^PRINT Erie

'"J . *■

338® LET a-»: LET d -2 : LET b-3-

_ET C 6

I'iuO i-(t.M =J£tD 3oab,b,t

^>300 REH S=EED => lane, a, a

>318 REM S=>ECD Enemy, d,a

3328 PRINT IHK 2; . REM CO.OL'R So

Jib

3330 PRINT INK 1; . REM CO_OUR -n

IEDI,

3340 LL1 3=7 R=M UE^TOR 3oab,a
. LiVCi -ET i-4: REM UC3TOR =lsi,t,,i
3360 ^ET J«12 REM UECTOR Er«m^.

i3 70 .= OP C=3 TO 13 STEP 13

3380 fop a*0 To see step 10

30ftO LET b-E. LST d -38
.'■lti0 REM S3UND b .. i . , H . .j
3410 NEXT a. NE)CT C
3420 PAUSE 180

3430 BEEP ,2,-12: BEEP .2,-10 E
= EP .2, e BEEP .JC.-1C &:cp .e,
-12 SEEP ,2, -IB. BEEP .2,-3. 3E
iP .2,-7; 3EEP .2,-5: BEE» .2,-8
BEEP .2,-B: BEEP .3,-7: BEER .
i . -5 BEEP .3, 5
*440 .TIUS.C 3©

3450 rOR a=0 TO 7 pqiPER a
3460 INK 9. PRIVT PR=»ER a-KBtia
--0J ; INK 9, . REt PEP-ACE
3470 LET b=40: _ET c=5. LET d «B '

LET » "OB is
J480 REH 53UND b,C,d,e
3490 *EVT a PA=EP 7: INK
?S80 LET a*=' (.-■•,•'., iny R«y io

ccniinie

5610 TAINT rtO.RT 1 , *); DRX3MT 1, *

ilS20 PAUSE 5 L£T <t* = a»i2 TO )+*

*<!•<

3530 IF IN<EY*="' THcN GO TO 351

3S40 CLS

it-60 PRINT AT 17, C; FLASH 1, BR I

SMT l; "SELECT LJUGL."

3568 PRINT "0 - Easy"

357(1 PRINT "1 - |-te<J*J"'

35B0 PRINT "2 - Hard"

<S90 PRINT "Z - uery Herd"

3608 INPUT "Please 5suct.",Le^f

I

JOJO ir LceKCI OF LtVC W3 OR _c

/eloINT Level THEN SO TO 6600

?S1S REM ERASE =lane

SSfiO RETURN

?080 RESTORE

jo ie rof *=u*r ■'.»•■ to usr "a ♦* /

?WfcB READ b: PO<E 8,b; NEXT a
3030 RETURN

3O40 DATA 3,0,0,0,56, 124-, 124,53
S8E0 DATA 2SE, 153 , 153 , 255, 2S6 , 15
3, isj, ass

3060 DATA 24,60,126,255,255,153,

i5:,£SS

*070 DATA 3,152,145,159,223,153,

153,255

■l.-V O HITh s,e,a49,33 l S33,233,lS,

5090 DATA 3,0, lii4,195,255,2BB,«.,

9500 SAVE " Bomber " LINE 9998: SA

i>9v0 CLEAR 61029: LOAD ""CODE
9999 RUK

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Jusi ttvc conmems ttom "ull long;!' revcvsul t;ur powerful aid virtualy flii imolqirxtntaHjn jl Siandwo t&sza Ttx> aAtmliges of itiiriy Pascal a>e- v-»ll-«'0wn fast, se.f-

rtw»m»ri;(io. unnshm* nil sm.niinml unigramsair. iw.v with Hisof: Pascal, vou can touj>»l tbise otnefitsons wide -aiceof hone pmpmers incljdiim tha48KSincaii Spectum'

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virtiatlv lullinplemeniai>onol the lanuuajfr slowing th* user lo ievebp Hue hnh-l<vel language skills >.ih\k aitiininij executicn spaeo [lose to that ol machine code. Compute wth ;i

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Hiscft Postal is alio awiiuHe in a va idly of disk Icnnais tnducfhg wquentidt FILE nsnelirg.

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programming. Bu It doesn't stop mere; lirV > AC 3 Abu in.kjdua <jn Iin.iju'iufe ctobvgtCN/<t«*a3i0ml»e< gvk*9 j(aj 4 fiu»-, ,..->, i.:i disXfey _>* ii-e 20J ayjtem or>d ollowng extensive

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Hlsoft DEVPAC 3 |ZX SPECTRUMI CI* inclusive

(Nev.Brimi 125 inclustvo
«"*6TOP PRES6*** Hitoft P;ic«jl fjr ilu SPECTRUM "o«. com« wmpiilo .vnh » Ti. ti» r.rae>lK« ^/•tx-ja aln^ing fnsT afrt eiwy O'^rt'""'^" "f cnmnh» omphir rfmlnyis

Hiioft Pascal and Hisoft Dovpnc nlso nvoilabli on ZX Microdrive pit aae writ) foi details

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UI|Men Buzurd. Bids. LU? 0SF>

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YCUR COf/lPLTEF, APRIL 1 934 227

GGNWTER 661 3036

CLASSIFIED

Contact: Claire Notley

ADVERTISEMENT RATES

Copy Date

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(AAln. 15 words)
Box No: £4.00 exra
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prepayable and tie arder form
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facili'ios ore available.

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Three insertions £8.20

Six insert ons £8.00

Twelve insertions : £7.50

Display advertisers shou d
preferably reserve space by phone.

Closing date for Classified
advertisements is the 23rd

Marnh.

Post to

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Sutton. Sjrrey SM2 5AS.

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4. JUMPING JOHN

Tils game has 7 levels v.'hl:n y:.. have to
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til evi ni jh v \' you ere gooa enough ycu have
u hew XP2 Q'.*d, iriiltnufiR iwn wllli <■ li.il;
in nail o' fame fS.DO

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Cog-Bieaih Each stags of four quest
boconing harder a; you Igap thj rampars
When thrj hull ings you mova or 10 3 higfer
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n.oo

5. MAZE OF DOOM ^ ou * r « a bwo wiiard n Cinditn ard vcur
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Dare you face
The Turk

The original "'"urk v/as ar
eighteenth century auto-
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INCLUDE:

•6 Levels of Difficulty
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•Blitz Chess Against the

Clock
•Two Player Mode
•Unfinished Games can be
. Stored
•Recommended Move

FULL INSTRUCTIONS

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43K Spectrum rrvcode orcado Dack. Kro:y
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SCTSAWFfJUHLVICai
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avirlolic ■.'!..:• • ■"- trt- irenorf slb on :

miuliei !•:■? Csttest! w.i rsir.dioni
CMC

SQTSAtfE. 55 STOSEWOOO. BEAN,
ft MRTHBD, IffHT 0A2 832 8b

lummuouhe. et gangs, Hac-Man,

Ecrambie. Escape M.2.P. Mfiic MlrHr,
KraiyKorg, Mactine Code Asscmljlor ;5
each. Hl'JS select on if Spectr jn g.incs.
eg :- StonKe's, >»: Pac. Atic <vtBc, 5o"i<t
Kamp lot lists to Litikcote So'tware 3dx
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134

VIC20COPYTAPE

Prcducc sectjnty Lijl .. up ccpic!; o' yoi-r
prrgr.nnr.. Eflici:nl and nnr.* tn U&J
prcgrarr :<;::•:■■ D;i:.::. Vithnr CodC,
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new caisora, Works on any si» VIC. Her
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228 YOUR COMPUTER, APRIL 1984

DO IT WITH

Would you like to transfer your Spectrum programs from
1) TAPE T MICROORIVE 3) MICRODRIVE TO TAPE

2WE "0 "APS 4) WICRODRIVF 10 MlCROHRIVF

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■: 13

When replying to
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advertisements,
readers are
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SPECTRUM
SOFTWARE

HOKFJIl I'M 80. AHCADIA 15 3b. .IFTP/1C I b J!>. COOH.IL
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ITEXT SOFTWARE a rew range ol educational programs.

TODDLERS (pie school]
LEARN voLr ALPHABET
LEARN 10 COUvIT
LEARN yoir COLOURS
LEARN yoir SHAPES

Ajour th< HOJSr.

AJOUr lh( KITCHEN

Ajour CLOThcs

£3.95 sach

MUMS & DADS
ITEXT raiiklinik IFrtplithl
*"XT ■ :> ikln :!'< tChintsol
Mf.xr uu-jkbeuk Uialian)
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£6.65 oach

Sonet cheque or Postal Orcter to;

TECTEL

Telford Opportunities Centre, Halestield 14,

Telford, Shropshire.

Tel. 0952-58173B

PSPCJ.SO/of tontio) bt&tdsfl lor ttwvs

1*

&*

Green Fingers

GARDENERS!!

Here's volt FIRST computerised plant database!

* Only BO seconds to find the ideal plants to fit your
special requirements.

Ynn ran as< fnr plants th<-t sjit up to any 5 out of
1 7 characteristics simultaneously (height, sun and
sol n3ecs, month of flcwering, etch For example,
if you wanted an evergreen shrub that liked po'tiol
shade to bloom in February/march, 'Green Fngsrs'
would suggest Camellia japonica' or 'skimmia
rBttvtHaiaria' within 80 seconds 0" your ente'lng
your reqjest.

* ComprehensivB datails of over 350 flowers, shrubs
and trees.

■*- Simple look-up option using species names,
common names, or part of names (e.g. 'lily'
displays nine dif-'orant typec or li y, any ono for
which you can obtain fuller details within 60
seco.ndsi.

To order cassettes for 48K SINCLAIR SPECTRUM send
cheque/postal crder for £8.95 to:

Practical Software

Dept. GF, 40 Worpie Road,

London, SW1 9.

127

YOUR C'JIWU I tH, AHHIL 1384 229

LYNX Software Libraiy. Tv\o wee'« hire
f I 90 Annual rv.orrh*».<hin f Fi 00 Stamp
lot list '_£•? Wilson HYl 100 B!en>-ern Walk,
Ccfbv Nortf->an-s

119

ZX SPECTRUM
32K RAM Up-Grade

C23.50 + VAT

SPECTRUM REPAIRS

£20.00 + VAT

MICRO-TEK

ELECTRONIC

SERVICES
01-520 6414 i

EDUC AT10I\ AL programs

for the SPECTRUM

Fnvsr;s."rsths so'tware wflltjn ay
staffcdshte t^echar.
*rea, voume, pvthBgo'aa. hok'ie's
tow. plccfostalics, optics probsbilry.

SJtS.

tacti oi these are quits 'enjthy whi:h

3f:1it:tlly ly.'it:li .irnl nnl jirjt test gsmaiy
:«lvi:rl.%r[l c.io:|l,'ltr-j

The lot foi onl r f"3 99

sltflH whtiiliKt TflKgi 4fiK mucMne

PO.Cheqjfls to

C.F. Sottwar«.

198Roll*ston Rd.

Burton on Trent
DE13 0LE

Enquiries .02831 351 7C 129

Commodore 6<1 & Vc 2C - 8K Soccer Club
Sees. Mamge you •'>■•" font naif main,
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Mr railv f?.99 D Srnnr.ii' J.lfl tow
grange Avetue. Bi'Nngham C'eveland

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perhaps in Modern Lanuuscjes? Help solve their problems with
your home computer.

INFO-STREAM offers software for SP-CTRIM, BBC, VIC 20

AMD ZX81 micros covs>rirrj mcut subjects m tin school

curriculum and catering for all ages and abilites Jp :o revision

ads for CSE, 'O' anc 'A' levels. The rarge incudes 'fun-to-

learn programs for the younger members of the family,

For a 42-page catalogue detailing over 220 educational

programs, please send £1 (refundable on first order) to:-

INFO-fiTRFAM |DftfUYC3),

36a Chase Green Avenue,

Enfield, Middlesex EN2 8EB.

112

YOUR MICRO COULD TEACH YOU

hm

T«TiT:T«TF|

...OR THE GERMANS...0R THE SPANISH

A home conputer is an expensive loy; and, if playing
games is all you do with it, atoy is all it is.

Now, using the NewPerscnai Computer
Superlearning System (PCSS) you can have fun with
your miurc and team something at the same .ime.

PCSS language courses cornpr se 12 lessons on
3 audio cassettes used in nnnjunr.tinn with a fourth
software cassette, to adc a new dimensior to learning.

inilially the software package enables you to see
the words you're learring; then, as your vocabu ary
develops, it will test your sk II inyournew language.

Anyone can learn this way - no orevious knowledge
of the language s required. The unique PCSS method
develops your overall learning and memory skilis in a
way thats both relaxing and enjoyable.

Eash PCSS language pac< -French, Ge-man or
Spanish - contains a comprehensive booklet detai ing

Ti

COMPUItRIStD EDUCATION S V STEMS

(HCSSsoHv/iiu i:,<i>rii|Mtirjii-w.|ti he'2X8' (ItiKl f X S:iCC iun BfcCMvn

.V.nn t li-ctron Men s )

Ciic' [jack comes wilh.rtuil noncy l<ucK>juaraniccil iio:cuniplC'lol>satsln

the 12audio lessonsand the function of the interactive
software. Add'tionally thebooketexpandsor the
broader benefits of the PCSS method.

At only £29.95 per pack PCSS costs less than other
home language courses yet luffeis much mere in
terms of education and enjoyment.

Complete the coupon helcw and try PCSS for
yourself -you'll be amazed what your micro can
teach you.

Send your cieqje or Postal Orderfor C29.95 made payable lo:
MDA Mockxi Associates L I mi ted. 561 Upper Richmond Road West,
London SW14 7ED. (ZX81 users £26.95)

jr, sil ter natively phO'nvlWwMa 01 2CO020Oriuw, liriwsop«n 24 hums
and quote your Visa. CIners Club, Access or American Express numbe - .

Tick which Audio/software package you require. (Prices ncludeVAT.
*dc £1.45 for postage anc pasKirg on each order.)

Flease supply ire following Audio/software Packages

FRENCH G GERMAN Q SPANISH □

Machine Typs:

. Werrory Size:.

574/H

232 YOUR 20MPUTen. APRIL 1984

r.

c;

E

If you are interested in a particular article /soecial
feature or advertisement in this journal

HAVE A GOOD LOOK AT OUR
REPRINT SERVICE!
We ofter an excellent, reasonably priced service
working to your uw i specifications to produce a
valuable end prestigeous addition to your
promotional material. (Minimum order 250 copie*>.
Telephone Michael Rogers on 01-661 34S7 or
compete and retu r n the form below.

To: Michael Rogers, Your Computer, Reprint Depart-
ment, Quadrant House, Sutton, Surrey SM2 5AS.

I am interested in copies of article/advert.

headed featured in this

journal on pages , issue dated

Please send me full details of your reprint serves by
return of post.

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Address

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totally confused?

made comparisons?

nearly compromised?
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YOUR COMPUTER. ARRIL 1 9S4 233

Hot*
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Acorn Computer

T-jlep-ione: Cambridge 0223-245200

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Texas Instruments

TalnfhfinA- FWUflrtl t>734.fft?1 1

DATEBASE

Local, national and
international micro
events are updated
here. To publicise
your event, phone
Paul Bond on
01-661 3472.

Midland Computer
Fair

HjiI ? JiIE'1 B rmingkam. from I to
| 7 May i* iht venue ft* uus, regional
extension i»r' the Computer Pan
TeleplvHic Reid Lxhibiiiwrs 01-043
8040 fa mure irila.

Compec Wales

CaidiftTnivcr.ilv, April 10 in l'2foi
buMftess computers, peripherals,
micros, minis ;nd i!A.)s. 1 ulephuiie
uiol J (km).

Electron & BBC
Micro User Show

Jh.'ic vtigtt be sonic robots as well
,n ihu New Horticultural Man,
Londou, isi March 10 i April.
Telephone tX>)-45S «18J.

Kaon p age Oeftt and Marguerite Ryan Urn aims to hoid back
'ne micro crazed noiaes eager o rusti info Stttfyw. ohtitovU 'u
i>e the worlds largest computet slots. Ths 25.000 square foot
showroom at Stonebndge Park, north/vest London is the first cf
many

A

E

Meitxiurrj! House

lb 19

S<;rt;ens

84

.VKFSn lw«re

30

Tar! 5 Cojrt Computei Fair

Memolech

24 £5 31

Severn

41

AG r Hardware

42

Euro El0;ucr»iC3

198

Micro X

14i

Strv&rn Software

28.29

ASb

210

Ever/da) Eledronics

198

Mtcrobureau

100

SharasScllwsre

15?

Abbe*

7

Mictocai

134

Siivfiriind

196

Aiaiiii Com nKHir-.

13 30 37

F

Microdetl

70

Sinclair H<w<nncr

34. 3t

Adckcitve Games

20b

First Byte

106

Micioma laysmeni

1'8 181

Si'Co-ripuiers

10^

Advance lecncology

101

Fox Electronics

92

Miciomeja

215

SKy.VcvrS

50

Aiiv^nturo Iniematona

63. 127

MicronelSOT

10 11

Sofieh

217

An nog

Pi 1

G

Micropenpberals

:i i:-;:l- r, -■ i-

Soil ware index

I4t;

Aquarius

186

GCCCarnbrdge

196

COVGI

Software Library

9(>

Goc6>til

210

MicropOurei

ieo

SclK'.'^re P'wjecis

22.23

3

3eeBuf
Iteiasof:

Ci iiolt

15-1

VlCKiVJU'1'Ul Op

9

Rpr>r.i nvtrlftn

■>m ??1

170
58

kidisnd Cootpu ei F

an 216

Speci um

138.143

H

tViKioyeii

163

Srj<ril Software

14/

He'A'SonConsu tans

8± 120

r/inOTSOll

2C4

Slorm

76

3eyond Oollweri
3nJG Software
Slaby

113
1G7

50

Hilton
Htacll

41

227

Mogul

1C2

Sijari i abiea
Swanley

90
132

3ucov(e
Bytewe I

14

14

I

I3P

43

N

Naiir-ndi Sort wore l

brary 210

T
T*KlyCorporaticn

60

Inagine 54

97 108

o

1a"50<t

226

CDS Mi;rosyslems

118 119

Incantivs Software
industrial Fiocess

27

130

Ocean Pubiisbiro,

Back Covei
f4

'..-.mao

146

G

0JE Micros

1 00

l"l«?CH|ili'ir VIiCios

201

C'n

126 120

thoiichlsSi Crosses

189

3P Software

203

lil-:. -lace

48. 154

Cficn

/6

Timedata

21

CHI . 1/5

224, 225

1 oii'o ro'AS World

96

Cambridge Micra Electronics 84

'

P

Caiaiqcn

eanell Software

20.21

■.amar

152

1/0

P5S
PiclLresque

Pinonuisl

HrdC'iCdlCtlllputllU

Pren. ice- Hall

MiiiiIu Flollii!

Protisotl
Mrolek

197

90

2(6

223

198. 199

222

195

8 1 10 2H5

U

tjlicnale PlayiheOarne

155

Dfisr.ario Games

Certresofi

ConrntdO'e
Coopusound
Conpuiei Cabn
Conpuier Fairs

Conpuiei Link

•93

32.33

62.63

27

■60

94

212

.utr.lie -tun I'psio-; FioiiI uovci
4 ynn Wiley 150

K

Ktsirpsl 3ii Micro 56
Kcsnos 9

V

Vi gin Games

Vniors

Visiors;o r e

W

4 5
115

102

Cor vpu;ei Pro
Cpnputerlowr

52
218.219

Kurro

/5

Q

OED

0uicK.sU/a

144
66

W tlgil

Wl ian S uart Syslerns
W/veWi

as

96

40

Crystal Compuiers

213

L

J.CL

205

LOvvl

212

Y

D

; Hvsi 9

207

You« 2ompuer

DJL

26

.rfitiaSOf*

172

FD Labofetlcnes

148.2 2

Si.os(.^p!<ons

190

OK troricc

SB

FKiJiirrlf,

52

ORG Peripherals

38 39.41

M

Fomik

122

Z

Dale!

37

MG Lpttiionen

202

Z> (Wi-rnfair

208 209

Deal 6 eci-omcs

214

kiaioot

22/

5

Zr.al

58

Uyramics

132

Mayf an Micros

170

SttUe

10G

iTcro

96

234 YOUR COMPUTER, APRIL 1384

1

\

N

.. you have been waiting for printer
prices to fall -THE WAIT IS OVER!!

cuiMiA/A m rt>an _„ A fes**- »«*««»

SHINWA CTI CP80

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Personal Collection welcome, Monday
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"Up to £1000 Instant Credit available,
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Repayments quoted are correct at time of
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To: Keyaki Ltd, Enterprise House, 44 Terrace Road.
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Pieas? send me

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Name

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-FOR USE WITH
POPULAR MICRO'S
INCLUDING - BBC, IBM etc.

Telephone

Tick box For details of Serial Interface options

Tick Lox fur deraiis of instant Credit up to £1000 1 I

/ enclose my cheque no. for£..

Please charge my A ccess/Bcrchycard Card Nc.

LIMITED
Enterprise House, 44 Terrace Road, Walton-on-Thames,
Suttev. KT12 2SD Tel; 09322 42777

Signature.

^^^^^^J l:;:-.:::w.::wi|

K4

T*ADE & EDUCATIONAL ENQUIRIES WELCOME

<^A

• 2 *

*«««

l's right, even the pirates will be dropping thef^dttpir

Moon Alert, to join In the swinging fun with Hunchback, to attack with Android Two, jump for

their fives with Fogo, spin themselves dizzy with Chittrae Joggfen they'll just crack-up with

Eskimo Eddie's Arctic action and there will be no stopping the captain once he gets his

hook on Mr Wimpy that zany burger battle. Don't you miss all the Ocean action get

down to your local dealer now and join in the fun and games.

Moon Alert Speci!um5*90 ^"^^"^"^ ' ■ « Chinese Juggler Corr.m 64 6 90

Hunchback Spectrum, C>mm 64, One 6 -90 IF £ ^g A A jl Eskimo Eddie Spectrum 5-90

Android Two Ommodore646-90 ^ A ~ A.'"**^^ I Mr. Wimpy Comm.64,Cric6-90

Pofo Sjvrtriim 5-90 SliMaB^MMF Spectrum 5-90

Ocear So»:wa/e is availiWe from selected brioches ot WOOUVORTH . \v II SMI t H. J^ 1 . John Menses. WSMfS. (tumbetows.
Spectrum Shops and a!) good software dealers. Trade enquiries phone" 36 1 8J2 704?.

Ocean Software • Rati) Building- Stanley Street • Manchester M 3 bJ-D • lei: 061 832 9143